Skip to content

Latest commit

 

History

History
47 lines (33 loc) · 2.13 KB

osrm-with-telenav-traffic.md

File metadata and controls

47 lines (33 loc) · 2.13 KB
Raw

OSRM with Telenav Traffic

There're several ways to apply telenav traffic on OSRM.

  • Re-customize Traffic
    • fetch traffic
    • osrm-customize to customize traffic into OSRM data
    • osrm-datastore to switch new metric via shared memory
    • looping
  • Alternatives ranking
    • calculate N alternatives
    • calculate weight/duration for these N alternatives
    • ranking by weight to get best one(or several)

Recustomize Traffic

This is the official way that provided by OSRM to integrate traffic data, see details in OSRM Traffic.
With command line tool osrm-customize, traffic data can be applied to OSRM compile data directly, and we can use tool osrm-datastore to enable the new data for osrm-routed. For NA it needs about 10~15 minutes for the whole process. It's still valuable even it's too slow for us (see more details in #30).

Architecture

  • [new tool] osrm-traffic-updater

    • It's used to pull live traffic data from traffic-proxy by RPC, then convert contents to OSRM required csv format and then dump to file.

  • [new service] traffic-proxy

    • It's a traffic side service provides live traffic data by RPC.

Recustomize Traffic Container Flow

Alternatives Ranking

The idea is adding a ranking proxy service(we name it osrm-ranking) at the front of osrm-routed, then dynamic apply traffic for each route request:

  • calculate N alternatives
  • calculate weight/duration for these N alternatives
  • ranking by weight to get best one(or several)

OSRM project discusses it a lot, see more details in #76.
We possible to achieve dynamic live traffic & historical speed applying by this method.

Architecture

Sequence