diff --git a/docs/location.md b/docs/location.md
new file mode 100644
index 00000000..72cf9a40
--- /dev/null
+++ b/docs/location.md
@@ -0,0 +1,86 @@
+# `location(station)`
+
+`station` must be in one of these formats:
+
+```js
+// a station ID, in a format compatible to the profile you use
+'900000123456'
+
+// an FPTF `station` object
+{
+	type: 'station',
+	id: '900000123456',
+	name: 'foo station',
+	location: {
+		type: 'location',
+		latitude: 1.23,
+		longitude: 3.21
+	}
+}
+```
+
+## Response
+
+As an example, we're going to use the [VBB profile](../p/vbb):
+
+```js
+const createClient = require('hafas-client')
+const vbbProfile = require('hafas-client/p/vbb')
+
+const client = createClient(vbbProfile)
+
+client.location('900000042101') // U Spichernstr.
+.then(console.log)
+.catch(console.error)
+```
+
+The response may look like this:
+
+```js
+{
+	type: 'station',
+	id: '900000042101',
+	name: 'U Spichernstr.',
+	location: {
+		type: 'location',
+		latitude: 52.496581,
+		longitude: 13.330616
+	},
+	products: {
+		suburban: false,
+		subway: true,
+		tram: false,
+		bus: true,
+		ferry: false,
+		express: false,
+		regional: false
+	},
+	lines: [ {
+		type: 'line',
+		id: 'u1',
+		name: 'U1',
+		public: true,
+		class: 2,
+		product: 'subway',
+		mode: 'train',
+		symbol: 'U',
+		nr: 1,
+		metro: false,
+		express: false,
+		night: false },
+		// …
+		{ type: 'line',
+		id: 'n9',
+		name: 'N9',
+		public: true,
+		class: 8,
+		product: 'bus',
+		mode: 'bus',
+		symbol: 'N',
+		nr: 9,
+		metro: false,
+		express: false,
+		night: true
+	} ]
+}
+```
diff --git a/index.js b/index.js
index 5c5f3a6a..91c9cf50 100644
--- a/index.js
+++ b/index.js
@@ -5,9 +5,9 @@ const maxBy = require('lodash/maxBy')
 
 const validateProfile = require('./lib/validate-profile')
 const defaultProfile = require('./lib/default-profile')
-const request = require('./lib/request')
+const _request = require('./lib/request')
 
-const createClient = (profile) => {
+const createClient = (profile, request = _request) => {
 	profile = Object.assign({}, defaultProfile, profile)
 	validateProfile(profile)
 
@@ -83,7 +83,7 @@ const createClient = (profile) => {
 			maxChg: opt.transfers,
 			minChgTime: opt.transferTime,
 			depLocL: [from],
-			viaLocL: opt.via ? [opt.via] : null,
+			viaLocL: opt.via ? [{loc: opt.via}] : null,
 			arrLocL: [to],
 			jnyFltrL: filters,
 			getTariff: !!opt.tickets,
@@ -133,7 +133,27 @@ const createClient = (profile) => {
 		.then((d) => {
 			if (!d.match || !Array.isArray(d.match.locL)) return []
 			const parse = profile.parseLocation
-			return d.match.locL.map(loc => parse(profile, loc))
+			return d.match.locL.map(loc => parse(profile, loc, d.lines))
+		})
+	}
+
+	const location = (station) => {
+		if ('object' === typeof station) station = profile.formatStation(station.id)
+		else if ('string' === typeof station) station = profile.formatStation(station)
+		else throw new Error('station must be an object or a string.')
+
+		return request(profile, {
+			meth: 'LocDetails',
+			req: {
+				locL: [station]
+			}
+		})
+		.then((d) => {
+			if (!d || !Array.isArray(d.locL) || !d.locL[0]) {
+				// todo: proper stack trace?
+				throw new Error('invalid response')
+			}
+			return profile.parseLocation(profile, d.locL[0], d.lines)
 		})
 	}
 
@@ -248,7 +268,7 @@ const createClient = (profile) => {
 		})
 	}
 
-	const client = {departures, journeys, locations, nearby}
+	const client = {departures, journeys, locations, location, nearby}
 	if (profile.journeyLeg) client.journeyLeg = journeyLeg
 	if (profile.radar) client.radar = radar
 	Object.defineProperty(client, 'profile', {value: profile})
diff --git a/lib/request.js b/lib/request.js
index dcfe552d..96d5da5f 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -1,14 +1,13 @@
 'use strict'
 
 const crypto = require('crypto')
+let captureStackTrace = () => {}
+if (process.env.NODE_ENV === 'dev') {
+	captureStackTrace = require('capture-stack-trace')
+}
+const {stringify} = require('query-string')
 const Promise = require('pinkie-promise')
 const {fetch} = require('fetch-ponyfill')({Promise})
-const {stringify} = require('query-string')
-
-const hafasError = (err) => {
-	err.isHafasError = true
-	return err
-}
 
 const md5 = input => crypto.createHash('md5').update(input).digest()
 
@@ -47,28 +46,40 @@ const request = (profile, data) => {
 		}
 	}
 
-	const url = profile.endpoint +'?' + stringify(req.query)
+	const url = profile.endpoint + '?' + stringify(req.query)
+
+	// Async stack traces are not supported everywhere yet, so we create our own.
+	const err = new Error()
+	err.isHafasError = true
+	err.request = body
+	err.url = url
+	captureStackTrace(err)
+
 	return fetch(url, req)
 	.then((res) => {
+		err.statusCode = res.status
 		if (!res.ok) {
-			const err = new Error(res.statusText)
-			err.statusCode = res.status
-			throw hafasError(err)
+			err.message = res.statusText
+			throw err
 		}
 		return res.json()
 	})
 	.then((b) => {
-		if (b.err) throw hafasError(new Error(b.err))
-		if (!b.svcResL || !b.svcResL[0]) throw new Error('invalid response')
+		if (b.err) {
+			err.message = b.err
+			throw err
+		}
+		if (!b.svcResL || !b.svcResL[0]) {
+			err.message = 'invalid response'
+			throw err
+		}
 		if (b.svcResL[0].err !== 'OK') {
-			throw hafasError(new Error(b.svcResL[0].errTxt))
+			err.message = b.svcResL[0].errTxt || b.svcResL[0].err
+			throw err
 		}
 		const d = b.svcResL[0].res
 		const c = d.common || {}
 
-		if (Array.isArray(c.locL)) {
-			d.locations = c.locL.map(loc => profile.parseLocation(profile, loc))
-		}
 		if (Array.isArray(c.remL)) {
 			d.remarks = c.remL.map(rem => profile.parseRemark(profile, rem))
 		}
@@ -79,6 +90,10 @@ const request = (profile, data) => {
 			const parse = profile.parseLine(profile, d.operators)
 			d.lines = c.prodL.map(parse)
 		}
+		if (Array.isArray(c.locL)) {
+			const parse = loc => profile.parseLocation(profile, loc, d.lines)
+			d.locations = c.locL.map(parse)
+		}
 		return d
 	})
 }
diff --git a/p/db/example.js b/p/db/example.js
index 72742f8c..f740bea9 100644
--- a/p/db/example.js
+++ b/p/db/example.js
@@ -10,6 +10,7 @@ client.journeys('8011167', '8000261', {results: 1, tickets: true})
 // client.departures('8011167', {duration: 1})
 // client.locations('Berlin Jungfernheide')
 // client.locations('Atze Musiktheater', {poi: true, addressses: false, fuzzy: false})
+// client.location('8000309') // Regensburg Hbf
 // client.nearby(52.4751309, 13.3656537, {results: 1})
 
 .then((data) => {
diff --git a/p/oebb/example.js b/p/oebb/example.js
index 9c656063..6a04412c 100644
--- a/p/oebb/example.js
+++ b/p/oebb/example.js
@@ -9,6 +9,7 @@ const client = createClient(oebbProfile)
 client.journeys('1291501', '8100002', {results: 1})
 // client.departures('8100002', {duration: 1})
 // client.locations('Salzburg', {results: 2})
+// client.location('8100173') // Graz Hbf
 // client.nearby(47.812851, 13.045604, {distance: 60})
 // client.radar(47.827203, 13.001261, 47.773278, 13.07562, {results: 10})
 
diff --git a/p/oebb/index.js b/p/oebb/index.js
index 0063f2d9..13a61284 100644
--- a/p/oebb/index.js
+++ b/p/oebb/index.js
@@ -48,10 +48,10 @@ const createParseLine = (profile, operators) => {
 	return parseLineWithMode
 }
 
-const parseLocation = (profile, l) => {
+const parseLocation = (profile, l, lines) => {
 	// ÖBB has some 'stations' **in austria** with no departures/products,
 	// like station entrances, that are actually POIs.
-	const res = _parseLocation(profile, l)
+	const res = _parseLocation(profile, l, lines)
 	if (
 		res.type === 'station' &&
 		!res.products &&
diff --git a/p/vbb/example.js b/p/vbb/example.js
index 089e5af2..079f85c3 100644
--- a/p/vbb/example.js
+++ b/p/vbb/example.js
@@ -9,6 +9,7 @@ const client = createClient(vbbProfile)
 client.journeys('900000003201', '900000024101', {results: 1})
 // client.departures('900000013102', {duration: 1})
 // client.locations('Alexanderplatz', {results: 2})
+// client.location('900000042101') // Spichernstr
 // client.nearby(52.5137344, 13.4744798, {distance: 60})
 // client.radar(52.52411, 13.41002, 52.51942, 13.41709, {results: 10})
 
diff --git a/p/vbb/index.js b/p/vbb/index.js
index 56519259..8ec996a2 100644
--- a/p/vbb/index.js
+++ b/p/vbb/index.js
@@ -55,15 +55,15 @@ const createParseLine = (profile, operators) => {
 	return parseLineWithMode
 }
 
-const parseLocation = (profile, l) => {
-	const res = _parseLocation(profile, l)
+const parseLocation = (profile, l, lines) => {
+	const res = _parseLocation(profile, l, lines)
 
 	if (res.type === 'station') {
 		res.name = shorten(res.name)
 		res.id = to12Digit(res.id)
 		if (!res.location.latitude || !res.location.longitude) {
 			const [s] = getStations(res.id)
-			if (s) Object.assign(res.location, s.coordinates)
+			if (s) Object.assign(res.location, s.location)
 		}
 	}
 	return res
diff --git a/package.json b/package.json
index 7b0dbcf7..f5d769c4 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,11 @@
 {
 	"name": "hafas-client",
 	"description": "JavaScript client for HAFAS public transport APIs.",
-	"version": "2.1.0",
+	"version": "2.3.1",
 	"main": "index.js",
 	"files": [
 		"index.js",
+		"throttle.js",
 		"lib",
 		"parse",
 		"format",
@@ -31,20 +32,21 @@
 		"node": ">=6"
 	},
 	"dependencies": {
+		"capture-stack-trace": "^1.0.0",
 		"fetch-ponyfill": "^4.1.0",
 		"lodash": "^4.17.4",
-		"luxon": "^0.2.11",
+		"luxon": "^0.3.1",
+		"p-throttle": "^1.1.0",
 		"pinkie-promise": "^2.0.1",
 		"query-string": "^5.0.0",
 		"slugg": "^1.2.0",
-		"vbb-parse-line": "^0.2.5",
+		"vbb-parse-line": "^0.3.0",
 		"vbb-parse-ticket": "^0.2.1",
 		"vbb-short-station-name": "^0.4.0",
-		"vbb-stations": "^5.9.0",
+		"vbb-stations": "^6.1.0",
 		"vbb-translate-ids": "^3.1.0"
 	},
 	"devDependencies": {
-		"co": "^4.6.0",
 		"db-stations": "^1.34.0",
 		"is-coordinates": "^2.0.2",
 		"is-roughly-equal": "^0.1.0",
@@ -52,10 +54,10 @@
 		"tape": "^4.8.0",
 		"tape-promise": "^2.0.1",
 		"validate-fptf": "^1.2.0",
-		"vbb-stations-autocomplete": "^2.11.0"
+		"vbb-stations-autocomplete": "^3.0.0"
 	},
 	"scripts": {
-		"test": "node test/index.js",
+		"test": "env NODE_ENV=dev node test/index.js",
 		"prepublishOnly": "npm test | tap-spec"
 	}
 }
diff --git a/parse/departure.js b/parse/departure.js
index a4fce0dd..e8f2d9bf 100644
--- a/parse/departure.js
+++ b/parse/departure.js
@@ -20,7 +20,7 @@ const createParseDeparture = (profile, stations, lines, remarks) => {
 			remarks: d.remL ? d.remL.map(findRemark) : [],
 			trip: +d.jid.split('|')[1] // todo: this seems brittle
 		}
-		// todo: res.trip from rawLine.prodCtx.num
+		// todo: res.trip from rawLine.prodCtx.num?
 
 		if (d.stbStop.dTimeR && d.stbStop.dTimeS) {
 			const realtime = profile.parseDateTime(profile, d.date, d.stbStop.dTimeR)
diff --git a/parse/journey-leg.js b/parse/journey-leg.js
index 56630d15..fac9ac44 100644
--- a/parse/journey-leg.js
+++ b/parse/journey-leg.js
@@ -26,7 +26,12 @@ const createParseJourneyLeg = (profile, stations, lines, remarks) => {
 		if (pt.dep.dTimeR && pt.dep.dTimeS) {
 			const realtime = profile.parseDateTime(profile, j.date, pt.dep.dTimeR)
 			const planned = profile.parseDateTime(profile, j.date, pt.dep.dTimeS)
-			res.delay = Math.round((realtime - planned) / 1000)
+			res.departureDelay = Math.round((realtime - planned) / 1000)
+		}
+		if (pt.arr.aTimeR && pt.arr.aTimeS) {
+			const realtime = profile.parseDateTime(profile, j.date, pt.arr.aTimeR)
+			const planned = profile.parseDateTime(profile, j.date, pt.arr.aTimeS)
+			res.arrivalDelay = Math.round((realtime - planned) / 1000)
 		}
 
 		if (pt.type === 'WALK') {
@@ -70,12 +75,11 @@ const createParseJourneyLeg = (profile, stations, lines, remarks) => {
 		// see also derhuerst/vbb-rest#19
 		if (pt.arr.aCncl) {
 			res.cancelled = true
-			res.arrival = res.arrivalPlatform = null
+			res.arrival = res.arrivalPlatform = res.arrivalDelay = null
 		}
 		if (pt.dep.dCncl) {
 			res.cancelled = true
-			res.departure = res.departurePlatform = null
-			res.delay = null
+			res.departure = res.departurePlatform = res.departureDelay = null
 		}
 
 		return res
diff --git a/parse/line.js b/parse/line.js
index 47333a14..79300c08 100644
--- a/parse/line.js
+++ b/parse/line.js
@@ -12,12 +12,11 @@ const createParseLine = (profile, operators) => {
 			name: p.line || p.name,
 			public: true
 		}
+		// todo: what is p.prodCtx && p.prodCtx.num?
 
-		// We don't get a proper line id from the API, so we use the trip nr here.
-		// todo: find a better way
-		if (p.prodCtx && p.prodCtx.num) res.id = p.prodCtx.num
 		// This is terrible, but FPTF demands an ID. Let's pray for VBB to expose an ID.
-		else if (p.line) res.id = slugg(p.line.trim())
+		// todo: find a better way
+		if (p.line) res.id = slugg(p.line.trim())
 		else if (p.name) res.id = slugg(p.name.trim())
 
 		if (p.cls) res.class = p.cls
diff --git a/parse/location.js b/parse/location.js
index b776b920..c0de893d 100644
--- a/parse/location.js
+++ b/parse/location.js
@@ -6,7 +6,9 @@ const ADDRESS = 'A'
 
 // todo: what is s.rRefL?
 // todo: is passing in profile necessary?
-const parseLocation = (profile, l) => {
+
+// todo: [breaking] change to createParseLocation(profile, lines) => (l) => loc
+const parseLocation = (profile, l, lines) => {
 	const res = {type: 'location'}
 	if (l.crd) {
 		res.latitude = l.crd.y / 1000000
@@ -20,7 +22,17 @@ const parseLocation = (profile, l) => {
 			name: l.name,
 			location: res
 		}
+
 		if ('pCls' in l) station.products = profile.parseProducts(l.pCls)
+
+		if (Array.isArray(l.pRefL) && Array.isArray(lines)) {
+			station.lines = []
+			for (let pRef of l.pRefL) {
+				const line = lines[pRef]
+				if (line) station.lines.push(line)
+			}
+		}
+
 		return station
 	}
 
diff --git a/parse/nearby.js b/parse/nearby.js
index e009b405..7c5b3b9a 100644
--- a/parse/nearby.js
+++ b/parse/nearby.js
@@ -5,8 +5,10 @@
 // todo: what is s.pCls?
 // todo: what is s.wt?
 // todo: what is s.dur?
-const parseNearby = (profile, n) => {
-	const res = profile.parseLocation(profile, n)
+
+// todo: [breaking] change to createParseNearby(profile, lines) => (n) => nearby
+const parseNearby = (profile, n, lines) => {
+	const res = profile.parseLocation(profile, n, lines)
 	res.distance = n.dist
 	return res
 }
diff --git a/readme.md b/readme.md
index 06081135..a0f71162 100644
--- a/readme.md
+++ b/readme.md
@@ -4,8 +4,8 @@
 
 HAFAS endpoint | wrapper library? | docs | example code | source code
 ---------------|------------------|------|---------|------------
-[Deutsche Bahn](https://en.wikipedia.org/wiki/Deutsche_Bahn) | [`vbb-hafas`](https://github.com/derhuerst/vbb-hafas), which has additional features | [docs](p/db/readme.md) | [example code](p/db/example.js) | [src](p/db/index.js)
-[Berlin & Brandenburg public transport](https://en.wikipedia.org/wiki/Verkehrsverbund_Berlin-Brandenburg) | [`db-hafas`](https://github.com/derhuerst/db-hafas), which has additional features | [docs](p/vbb/readme.md) | [example code](p/vbb/example.js) | [src](p/vbb/index.js)
+[Deutsche Bahn](https://en.wikipedia.org/wiki/Deutsche_Bahn) | [`db-hafas`](https://github.com/derhuerst/db-hafas), which has additional features | [docs](p/db/readme.md) | [example code](p/db/example.js) | [src](p/db/index.js)
+[Berlin & Brandenburg public transport](https://en.wikipedia.org/wiki/Verkehrsverbund_Berlin-Brandenburg) | [`vbb-hafas`](https://github.com/derhuerst/vbb-hafas), which has additional features | [docs](p/vbb/readme.md) | [example code](p/vbb/example.js) | [src](p/vbb/index.js)
 [Österreichische Bundesbahnen (ÖBB)](https://en.wikipedia.org/wiki/Austrian_Federal_Railways) | – | [docs](p/oebb/readme.md) | [example code](p/oebb/example.js) | [src](p/oebb/index.js)
 
 [![npm version](https://img.shields.io/npm/v/hafas-client.svg)](https://www.npmjs.com/package/hafas-client)
@@ -34,6 +34,7 @@ npm install hafas-client
 - [`journeyLeg(ref, lineName, [opt])`](docs/journey-leg.md) – get details for a leg of a journey
 - [`departures(station, [opt])`](docs/departures.md) – query the next departures at a station
 - [`locations(query, [opt])`](docs/locations.md) – find stations, POIs and addresses
+- [`location(id)`](docs/location.md) – get details about a location
 - [`nearby(location, [opt])`](docs/nearby.md) – show stations & POIs around
 - [`radar(query, [opt])`](docs/radar.md) – find all vehicles currently in a certain area
 
diff --git a/test/co.js b/test/co.js
new file mode 100644
index 00000000..595deb14
--- /dev/null
+++ b/test/co.js
@@ -0,0 +1,31 @@
+// https://github.com/babel/babel/blob/3c8d831fe41f502cbe2459a271d19c7329ffe369/packages/babel-helpers/src/helpers.js#L242-L270
+const co = (fn) => {
+	return function run () {
+		const self = this, args = arguments
+		return new Promise((resolve, reject) => {
+			const gen = fn.apply(self, args)
+			const step = (key, arg) => {
+				try {
+					var info = gen[key](arg)
+					var value = info.value
+				} catch (error) {
+					reject(error)
+					return
+				}
+				if (info.done) resolve(value)
+				else Promise.resolve(value).then(_next, _throw)
+			}
+
+			const _next = (value) => {
+				step('next', value)
+			}
+			const _throw = (err) => {
+				step('throw', err)
+			}
+
+			_next()
+		})
+	}
+}
+
+module.exports = co
diff --git a/test/db.js b/test/db.js
index e1d07c00..d8a7d640 100644
--- a/test/db.js
+++ b/test/db.js
@@ -3,9 +3,9 @@
 const getStations = require('db-stations').full
 const tapePromise = require('tape-promise').default
 const tape = require('tape')
-const co = require('co')
 const isRoughlyEqual = require('is-roughly-equal')
 
+const co = require('./co')
 const createClient = require('..')
 const dbProfile = require('../p/db')
 const modes = require('../p/db/modes')
@@ -92,7 +92,7 @@ const assertValidPrice = (t, p) => {
 const test = tapePromise(tape)
 const client = createClient(dbProfile)
 
-test('Berlin Jungfernheide to München Hbf', co.wrap(function* (t) {
+test('Berlin Jungfernheide to München Hbf', co(function* (t) {
 	const journeys = yield client.journeys('8011167', '8000261', {
 		when, passedStations: true
 	})
@@ -151,7 +151,7 @@ test('Berlin Jungfernheide to München Hbf', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('Berlin Jungfernheide to Torfstraße 17', co.wrap(function* (t) {
+test('Berlin Jungfernheide to Torfstraße 17', co(function* (t) {
 	const journeys = yield client.journeys('8011167', {
 		type: 'location', address: 'Torfstraße 17',
 		latitude: 52.5416823, longitude: 13.3491223
@@ -180,7 +180,7 @@ test('Berlin Jungfernheide to Torfstraße 17', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('Berlin Jungfernheide to ATZE Musiktheater', co.wrap(function* (t) {
+test('Berlin Jungfernheide to ATZE Musiktheater', co(function* (t) {
 	const journeys = yield client.journeys('8011167', {
 		type: 'location', id: '991598902', name: 'ATZE Musiktheater',
 		latitude: 52.542417, longitude: 13.350437
@@ -209,7 +209,26 @@ test('Berlin Jungfernheide to ATZE Musiktheater', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('departures at Berlin Jungfernheide', co.wrap(function* (t) {
+test('Berlin Hbf to München Hbf with stopover at Hannover Hbf', co(function* (t) {
+	const berlinHbf = '8011160'
+	const münchenHbf = '8000261'
+	const hannoverHbf = '8000152'
+	const [journey] = yield client.journeys(berlinHbf, münchenHbf, {
+		via: hannoverHbf,
+		results: 1
+	})
+
+	const i = journey.legs.findIndex(leg => leg.destination.id === hannoverHbf)
+	t.ok(i >= 0, 'no leg with Hannover Hbf as destination')
+
+	const nextLeg = journey.legs[i + 1]
+	t.ok(nextLeg)
+	t.equal(nextLeg.origin.id, hannoverHbf)
+
+	t.end()
+}))
+
+test('departures at Berlin Jungfernheide', co(function* (t) {
 	const deps = yield client.departures('8011167', {
 		duration: 5, when
 	})
@@ -228,7 +247,7 @@ test('departures at Berlin Jungfernheide', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('departures with station object', co.wrap(function* (t) {
+test('departures with station object', co(function* (t) {
 	yield client.departures({
 		type: 'station',
 		id: '8011167',
@@ -244,7 +263,7 @@ test('departures with station object', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('nearby Berlin Jungfernheide', co.wrap(function* (t) {
+test('nearby Berlin Jungfernheide', co(function* (t) {
 	const nearby = yield client.nearby({
 		type: 'location',
 		latitude: 52.530273,
@@ -268,7 +287,7 @@ test('nearby Berlin Jungfernheide', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('locations named Jungfernheide', co.wrap(function* (t) {
+test('locations named Jungfernheide', co(function* (t) {
 	const locations = yield client.locations('Jungfernheide', {
 		results: 10
 	})
@@ -285,3 +304,18 @@ test('locations named Jungfernheide', co.wrap(function* (t) {
 
 	t.end()
 }))
+
+test('location', co(function* (t) {
+	const regensburgHbf = '8000309'
+	const loc = yield client.location(regensburgHbf)
+
+	assertValidStation(t, loc)
+	t.equal(loc.id, regensburgHbf)
+
+	t.ok(Array.isArray(loc.lines))
+	if (Array.isArray(loc.lines)) {
+		for (let line of loc.lines) assertValidLine(t, line)
+	}
+
+	t.end()
+}))
diff --git a/test/index.js b/test/index.js
index 5675edb4..b278e8d2 100644
--- a/test/index.js
+++ b/test/index.js
@@ -3,3 +3,4 @@
 require('./db')
 require('./vbb')
 require('./oebb')
+require('./throttle')
diff --git a/test/oebb.js b/test/oebb.js
index 261cb548..90a7b350 100644
--- a/test/oebb.js
+++ b/test/oebb.js
@@ -4,12 +4,12 @@
 // const getStations = require('db-stations').full
 const tapePromise = require('tape-promise').default
 const tape = require('tape')
-const co = require('co')
 const isRoughlyEqual = require('is-roughly-equal')
 const validateFptf = require('validate-fptf')
 
 const validateLineWithoutMode = require('./validate-line-without-mode')
 
+const co = require('./co')
 const createClient = require('..')
 const oebbProfile = require('../p/oebb')
 const products = require('../p/oebb/products')
@@ -110,7 +110,7 @@ const assertValidLine = (t, l) => { // with optional mode
 const test = tapePromise(tape)
 const client = createClient(oebbProfile)
 
-test('Salzburg Hbf to Wien Westbahnhof', co.wrap(function* (t) {
+test('Salzburg Hbf to Wien Westbahnhof', co(function* (t) {
 	const salzburgHbf = '8100002'
 	const wienWestbahnhof = '1291501'
 	const journeys = yield client.journeys(salzburgHbf, wienWestbahnhof, {
@@ -175,7 +175,7 @@ test('Salzburg Hbf to Wien Westbahnhof', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('Salzburg Hbf to 1220 Wien, Wagramer Straße 5', co.wrap(function* (t) {
+test('Salzburg Hbf to 1220 Wien, Wagramer Straße 5', co(function* (t) {
 	const salzburgHbf = '8100002'
 	const wagramerStr = {
 		type: 'location',
@@ -213,7 +213,7 @@ test('Salzburg Hbf to 1220 Wien, Wagramer Straße 5', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('Albertina to Salzburg Hbf', co.wrap(function* (t) {
+test('Albertina to Salzburg Hbf', co(function* (t) {
 	const albertina = {
 		type: 'location',
     	latitude: 48.204699,
@@ -252,7 +252,27 @@ test('Albertina to Salzburg Hbf', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('leg details for Wien Westbahnhof to München Hbf', co.wrap(function* (t) {
+test('Wien to Klagenfurt Hbf with stopover at Salzburg Hbf', co(function* (t) {
+	const wien = '1190100'
+	const klagenfurtHbf = '8100085'
+	const salzburgHbf = '8100002'
+	const [journey] = yield client.journeys(wien, klagenfurtHbf, {
+		via: salzburgHbf,
+		results: 1,
+		when
+	})
+
+	const i1 = journey.legs.findIndex(leg => leg.destination.id === salzburgHbf)
+	t.ok(i1 >= 0, 'no leg with Salzburg Hbf as destination')
+
+	const i2 = journey.legs.findIndex(leg => leg.origin.id === salzburgHbf)
+	t.ok(i2 >= 0, 'no leg with Salzburg Hbf as origin')
+	t.ok(i2 > i1, 'leg with Salzburg Hbf as origin must be after leg to it')
+
+	t.end()
+}))
+
+test('leg details for Wien Westbahnhof to München Hbf', co(function* (t) {
 	const wienWestbahnhof = '1291501'
 	const muenchenHbf = '8000261'
 	const journeys = yield client.journeys(wienWestbahnhof, muenchenHbf, {
@@ -278,7 +298,7 @@ test('leg details for Wien Westbahnhof to München Hbf', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('departures at Salzburg Hbf', co.wrap(function* (t) {
+test('departures at Salzburg Hbf', co(function* (t) {
 	const salzburgHbf = '8100002'
 	const deps = yield client.departures(salzburgHbf, {
 		duration: 5, when
@@ -299,7 +319,7 @@ test('departures at Salzburg Hbf', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('nearby Salzburg Hbf', co.wrap(function* (t) {
+test('nearby Salzburg Hbf', co(function* (t) {
 	const salzburgHbfPosition = {
 		type: 'location',
 		longitude: 13.045604,
@@ -324,7 +344,7 @@ test('nearby Salzburg Hbf', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('locations named Salzburg', co.wrap(function* (t) {
+test('locations named Salzburg', co(function* (t) {
 	const locations = yield client.locations('Salzburg', {
 		results: 10
 	})
@@ -342,7 +362,17 @@ test('locations named Salzburg', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('radar Salzburg', co.wrap(function* (t) {
+test('location', co(function* (t) {
+	const grazHbf = '8100173'
+	const loc = yield client.location(grazHbf)
+
+	assertValidStation(t, loc)
+	t.equal(loc.id, grazHbf)
+
+	t.end()
+}))
+
+test('radar Salzburg', co(function* (t) {
 	const vehicles = yield client.radar(47.827203, 13.001261, 47.773278, 13.07562, {
 		duration: 5 * 60, when
 	})
diff --git a/test/throttle.js b/test/throttle.js
new file mode 100644
index 00000000..cc849218
--- /dev/null
+++ b/test/throttle.js
@@ -0,0 +1,27 @@
+'use strict'
+
+const test = require('tape')
+
+const createThrottledClient = require('../throttle')
+const vbbProfile = require('../p/vbb')
+
+const spichernstr = '900000042101'
+
+test('throttle works', (t) => {
+	let calls = 0
+	const transformReqBody = (body) => {
+		calls++
+		return vbbProfile.transformReqBody(body)
+	}
+	const mockProfile = Object.assign({}, vbbProfile, {transformReqBody})
+
+	const client = createThrottledClient(mockProfile, 2, 1000)
+	for (let i = 0; i < 10; i++) client.departures(spichernstr, {duration: 1})
+
+	t.plan(3)
+	setTimeout(() => t.equal(calls, 2), 500)
+	setTimeout(() => t.equal(calls, 4), 1500)
+	setTimeout(() => t.equal(calls, 6), 2500)
+})
+
+// todo
diff --git a/test/vbb.js b/test/vbb.js
index e613bdf7..e24a1ef8 100644
--- a/test/vbb.js
+++ b/test/vbb.js
@@ -5,9 +5,9 @@ const isRoughlyEqual = require('is-roughly-equal')
 const stations = require('vbb-stations-autocomplete')
 const tapePromise = require('tape-promise').default
 const tape = require('tape')
-const co = require('co')
 const shorten = require('vbb-short-station-name')
 
+const co = require('./co')
 const createClient = require('..')
 const vbbProfile = require('../p/vbb')
 const {
@@ -49,8 +49,7 @@ const assertValidLine = (t, l) => {
 	if (l.night !== null) t.equal(typeof l.night, 'boolean')
 }
 
-// todo
-const findStation = (query) => stations(query, true, false)
+const findStation = (query) => stations(query, true, false)[0]
 
 const test = tapePromise(tape)
 const client = createClient(vbbProfile)
@@ -59,7 +58,7 @@ const amrumerStr = '900000009101'
 const spichernstr = '900000042101'
 const bismarckstr = '900000024201'
 
-test('journeys – station to station', co.wrap(function* (t) {
+test('journeys – station to station', co(function* (t) {
 	const journeys = yield client.journeys(spichernstr, amrumerStr, {
 		results: 3, when, passedStations: true
 	})
@@ -97,7 +96,11 @@ test('journeys – station to station', co.wrap(function* (t) {
 		assertValidWhen(t, leg.arrival, when)
 
 		assertValidLine(t, leg.line)
-		t.ok(findStation(leg.direction))
+		if (!findStation(leg.direction)) {
+			const err = new Error('unknown direction: ' + leg.direction)
+			err.stack = err.stack.split('\n').slice(0, 2).join('\n')
+			console.error(err)
+		}
 		t.ok(leg.direction.indexOf('(Berlin)') === -1)
 
 		t.ok(Array.isArray(leg.passed))
@@ -112,7 +115,7 @@ test('journeys – station to station', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('journeys – only subway', co.wrap(function* (t) {
+test('journeys – only subway', co(function* (t) {
 	const journeys = yield client.journeys(spichernstr, bismarckstr, {
 		results: 20, when,
 		products: {
@@ -141,7 +144,7 @@ test('journeys – only subway', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('journeys – fails with no product', co.wrap(function* (t) {
+test('journeys – fails with no product', co(function* (t) {
 	try {
 		yield client.journeys(spichernstr, bismarckstr, {
 			when,
@@ -161,7 +164,7 @@ test('journeys – fails with no product', co.wrap(function* (t) {
 	}
 }))
 
-test('journey leg details', co.wrap(function* (t) {
+test('journey leg details', co(function* (t) {
 	const journeys = yield client.journeys(spichernstr, amrumerStr, {
 		results: 1, when
 	})
@@ -187,7 +190,7 @@ test('journey leg details', co.wrap(function* (t) {
 
 
 
-test('journeys – station to address', co.wrap(function* (t) {
+test('journeys – station to address', co(function* (t) {
 	const journeys = yield client.journeys(spichernstr, {
 		type: 'location', address: 'Torfstraße 17',
 		latitude: 52.5416823, longitude: 13.3491223
@@ -214,7 +217,7 @@ test('journeys – station to address', co.wrap(function* (t) {
 
 
 
-test('journeys – station to POI', co.wrap(function* (t) {
+test('journeys – station to POI', co(function* (t) {
 	const journeys = yield client.journeys(spichernstr, {
 		type: 'location', id: '9980720', name: 'ATZE Musiktheater',
 		latitude: 52.543333, longitude: 13.351686
@@ -241,7 +244,27 @@ test('journeys – station to POI', co.wrap(function* (t) {
 
 
 
-test('departures', co.wrap(function* (t) {
+test('journeys – with stopover', co(function* (t) {
+	const halleschesTor = '900000012103'
+	const leopoldplatz = '900000009102'
+	const [journey] = yield client.journeys(spichernstr, halleschesTor, {
+		via: leopoldplatz,
+		results: 1
+	})
+
+	const i = journey.legs.findIndex(leg => leg.destination.id === leopoldplatz)
+	t.ok(i >= 0, 'no leg with Leopoldplatz as destination')
+
+	const nextLeg = journey.legs[i + 1]
+	t.ok(nextLeg)
+	t.equal(nextLeg.origin.id, leopoldplatz)
+
+	t.end()
+}))
+
+
+
+test('departures', co(function* (t) {
 	const deps = yield client.departures(spichernstr, {duration: 5, when})
 
 	t.ok(Array.isArray(deps))
@@ -256,13 +279,17 @@ test('departures', co.wrap(function* (t) {
 		t.strictEqual(dep.station.id, spichernstr)
 
 		assertValidWhen(t, dep.when, when)
-		t.ok(findStation(dep.direction))
+		if (!findStation(dep.direction)) {
+			const err = new Error('unknown direction: ' + dep.direction)
+			err.stack = err.stack.split('\n').slice(0, 2).join('\n')
+			console.error(err)
+		}
 		assertValidLine(t, dep.line)
 	}
 	t.end()
 }))
 
-test('departures with station object', co.wrap(function* (t) {
+test('departures with station object', co(function* (t) {
 	yield client.departures({
 		type: 'station',
 		id: spichernstr,
@@ -278,7 +305,7 @@ test('departures with station object', co.wrap(function* (t) {
 	t.end()
 }))
 
-test('departures at 7-digit station', co.wrap(function* (t) {
+test('departures at 7-digit station', co(function* (t) {
 	const eisenach = '8010097' // see derhuerst/vbb-hafas#22
 	yield client.departures(eisenach, {when})
 	t.pass('did not fail')
@@ -288,7 +315,7 @@ test('departures at 7-digit station', co.wrap(function* (t) {
 
 
 
-test('nearby', co.wrap(function* (t) {
+test('nearby', co(function* (t) {
 	// Berliner Str./Bundesallee
 	const nearby = yield client.nearby({
 		type: 'location',
@@ -317,7 +344,7 @@ test('nearby', co.wrap(function* (t) {
 
 
 
-test('locations', co.wrap(function* (t) {
+test('locations', co(function* (t) {
 	const locations = yield client.locations('Alexanderplatz', {results: 10})
 
 	t.ok(Array.isArray(locations))
@@ -334,9 +361,23 @@ test('locations', co.wrap(function* (t) {
 	t.end()
 }))
 
+test('location', co(function* (t) {
+	const loc = yield client.location(spichernstr)
+
+	assertValidStation(t, loc)
+	t.equal(loc.id, spichernstr)
+
+	t.ok(Array.isArray(loc.lines))
+	if (Array.isArray(loc.lines)) {
+		for (let line of loc.lines) assertValidLine(t, line)
+	}
+
+	t.end()
+}))
 
 
-test('radar', co.wrap(function* (t) {
+
+test('radar', co(function* (t) {
 	const vehicles = yield client.radar(52.52411, 13.41002, 52.51942, 13.41709, {
 		duration: 5 * 60, when
 	})
@@ -345,7 +386,11 @@ test('radar', co.wrap(function* (t) {
 	t.ok(vehicles.length > 0)
 	for (let v of vehicles) {
 
-		t.ok(findStation(v.direction))
+		if (!findStation(v.direction)) {
+			const err = new Error('unknown direction: ' + v.direction)
+			err.stack = err.stack.split('\n').slice(0, 2).join('\n')
+			console.error(err)
+		}
 		assertValidLine(t, v.line)
 
 		t.equal(typeof v.location.latitude, 'number')
diff --git a/throttle.js b/throttle.js
new file mode 100644
index 00000000..99fb3cc0
--- /dev/null
+++ b/throttle.js
@@ -0,0 +1,13 @@
+'use strict'
+
+const throttle = require('p-throttle')
+
+const request = require('./lib/request')
+const createClient = require('.')
+
+const createThrottledClient = (profile, limit = 5, interval = 1000) => {
+	const throttledRequest = throttle(request, limit, interval)
+	return createClient(profile, throttledRequest)
+}
+
+module.exports = createThrottledClient