open source routing machine - foss4g 2016 bonn

Open Source Routing Machine

Johan Uhle@[email protected] Bonn August 2016

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Pipeline• OSM road network

• Processing

• Routing

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PipelineProcessing

• OSM planet

• AWS EC2: r3.8xlarge with 32 CPUs & 244 GB RAM

• car 9 hours

• bike 13 hours

• walk 18 hours

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PipelineRouting

• Car routing

• AWS EC2: r3.4xlarge with 16 CPUs & 122 GB RAM

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OSRM v5In-car navigation

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OSRM v51. Guidance2. Dynamic Speeds

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Guidance

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GuidanceAdditional instruction types

depart new namecontinue end of roadturn forkroundabout mergearrive on ramp off ramp use lane rotary roundabout turn

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GuidanceRamps

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GuidanceRoundabouts

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GuidanceCombinined Instructions

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GuidanceLanes

lanes=4turn:lanes=left;through|through|through|through;right

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OSRM v51. Guidance2. Dynamic Speeds

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Dynamic Speeds• Goals:

• Give realistic ETAs

• Choose the best route

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Dynamic Speeds

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Dynamic SpeedsCurrent Design

• Speeds assigned by profiles

• OSM tag maxspeed

• Type of road, e.g. primary

• car 65 km/h

• bike 15 km/h

• walk 5 km/h

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Dynamic SpeedsExternal speed data

• During processing

• Load external csv file with format

from_node,to_node,speed

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1. Freeflow

• Uncongested speed

2. Historical buckets

• In a typical week, speed for this 15 minute window

3. Realtime

• Speed "right now"23

Dynamic Speeds

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Mapbox SF office to SFO x: time UTC y: ETA seconds blue: static speed from profile orange: external speed data is dynamic with rush hour

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Mapbox SF office to SFO different routes over time

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Dynamic SpeedsFaster processing

• How to get speeds into osrm?

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• Make processing faster by:

• Caching

• Doing less work

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Dynamic SpeedsFaster processing: Caching

• Cache major parts of processing

• On speed update: only execute the speed relevant processing

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Dynamic SpeedsFaster processing: Do less work

• Tradeoff between processing time and query time

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Dynamic SpeedsFaster processing: Do less work

• Eventually: smaller geographical areas process faster.

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• Turnaround time for processing: 3 hours -> 10 minutes 1

• Route request time: 20ms -> 200ms

1 Shuttling of data between processing and api instance not included

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Thanks• OSRM has in-car-ready guidance

• Bring your own speeds

Johan@[email protected]

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• project-osrm.org

• github.com/mapbox/guidance-sim

• Maps © Mapbox © OpenStreetMap contributors

• Map from JOSM © OpenStreetMap contributors

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open source routing machine - foss4g 2016 bonn

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