Routing API Developer's Guide

Time Aware Routing

Time aware routing enables optimal handling of time-dependent restrictions, including

  • Direction of travel restrictions (including reversible roads)
  • High-occupancy vehicle (HOV) lanes
  • Time restricted maneuvers
  • Seasonal closures

The route is computed respecting time zones (including daylight-saving time) and respects time related events (including traffic) along the whole route.

When user specifies a departure time in the request, time aware restrictions are taken into consideration accordingly. When the user is in trip planning mode (departure time is not specified) time aware restrictions are not taken into consideration.

In case a maneuver is a subject to potential time restrictions a respective warning is provided in the JSON output as a note in the maneuver section. Type of the note may be following:

  • restriction - when it is possible to avoid the maneuver
  • violation - when it's not possible to avoid the maneuver

Note type depends on the restriction type and on wheather route is requested in time aware or trip planning mode. Following table lists note types that may be provided.

Type of restriction Time aware mode Planning mode
Restriction violated Restriction present
Reversible Express Lanes violation restriction restriction
Carpool HOV Lanes violation restriction restriction
Seasonal Closures restriction restriction restriction

In JSON output following note is added to maneuver section in case of time dependent warning:


note : [ <1 elem>
    0 : {
      type: restriction|violation
      code: timeDependentRestriction
      type: "..."
    }
]

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