Lane Guidance

From Wazeopedia
Waze does not expect or want Lane Guidance to be applied to every available junction with multiple lanes.

Considerations for Lane Guidance

As with all mapping in WME less is more. Lane Guidance is intended to help with potentially confusing junctions, these have historically raised URs and may already have been mapped with extra segments and TIOs in an attempt to simulate lane guidance.

Lane Guidance will appear in the client approx 1km in advance of a junction for mH road types and above, 500m in advance for lower road types.

Lane Guidance should never be used when a single lane is used for all directions (unless required as part of a wider heuristic H / # junction), nor should Lane Guidance ever contain more lanes than are available to the user.

Lane Guidance should not be mapped when there is only one possible route no matter the number of available lanes (unless required as part of a wider heuristic H / # junction).

Lane Guidance should not be mapped for filter lanes for side roads. These are not running lanes but allow vehicles to stop off the main carriageway line, to ensure traffic flow is maintained.

Keep left / keep right junctions

Using current rules for keep left / keep right, Lane Guidance should not be added to simple motorway or highway junctions (exits) unless it meets the requirements for KL / KR.

Lane Guidance does not currently have text-to-speech so any existing KL / KR TIOs added to the map should be retained.

Complex junctions

Lane Guidance should allow us to simplify many complex junctions making the map cleaner and clearer in the client. When simplifying a junction you should consider how it may affect routing through the junction. Additional turn lanes are often physically mapped to better control u-turns, you may wish to remind yourself of how to control u-turns at H and # junctions. You should also try to preserve any verbal instructions given through a junction to ensure user experience is not harmed from the simplification.

Bus lane at junction

Restricted lanes

Junctions that include a restricted lane should not be mapped with Lane Guidance at this time. There is currently no way to mark a lane as being restricted, either by vehicle type or time. Due to this any Lane Guidance mapping is likely to cause confusion as the guidance displayed will not match what the wazer sees on the ground.

Lane Guidance limitations

Segments with only one exit direction can not have multiple lane directions mapped using Lane Guidance. This mean you can not map Lane Guidance on the approaches to roundabouts, and you currently should not be mapping Lane Guidance within a roundabout.

Lane Guidance can not be added to roundabouts.

(Heuristic) Lane Guidance does not current work within Junction Boxes. In preparation for Lane Guidance through Junction Boxes ensure that all turns are allowed within the junction box and routes controlled solely by the Junction Box.

Adding Lane Guidance

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  1. Select the segment
  2. Click on the Lanes tab
  3. Click Add lane guidance for the appropriate direction of travel (you may only see 1 option)
  4. Change the number of lanes to match the road layout (in the direction of travel only) at the point of the exit node
  • The choice of Lane Guidance turns shown for each segment is initially determined by the angle of the exit segments, snapping to the nearest 45 degree angle
  • This is not the same angles as used for verbal instructions, using the JAI script will help but is not always correct for Lanes. Example: Straight on (not instruction); Verbal: ±45 degrees from straight, Lanes: ±22.5 degrees from straight.
  • Select the lane check box(es) that apply for each of the generated turns
    • You can override the suggested lane guidance directions by clicking on the arrow image for each group of lanes

    Disabling a turn with Lane Guidance will delete all store information, if the same turn is re-enabled in future Lane Guidance will need to be input again.

    Changing the angle of junction segments that already have Lane Guidance may lead to issues with how Lane Guidance is displayed in the app. It is advised to add a Map Comment to junctions that include Lane Guidance

    Do not split segments to provide Lane Guidance in advance of a junction, this will cause a loss of any and all Lane Guidance data on the segment.

    Continue straight arrows

    It is possible to override the behaviour of Lane Guidance when you map a junction with straight ahead arrows, this override is unique to each mapped segment and can not be set globally for a junction. The behaviour is as follows;

    • Waze default - the client will only show the mapped straight ahead arrow(s) if there is an associated instruction
    • View only - the client will show the straight ahead arrow(s) regardless of the need for an instruction
    • View and hear - the client will provide a verbal continue straight instruction (similar to a TIO) and also show the straight ahead arrow(s)
    If you are adding a straight ahead override to a junction that is a candidate for heuristics, the override must be added to the entry segment only.

    H / # Junction mapping

    For H or # junctions that are;

    • mapped at near 90 degrees
    • have near parallel segments
    • and have a median segment of 50m or less

    Waze will combine Lane Guidance, using a heuristic approach, to give the appropriate images depending on the direction of the route through the junction. The Lane Guidance should be mapped in sections through the junction as shown below:

    Lanes suggested by WME will not include u-turn option, this is created automatically by the system.

    You should always add Lane Guidance to the entire H or # junction to ensure the heuristics work correctly and to prevent any unwanted instructions from an unmapped direction. Heuristics will not work for more complex junctions or those that do not fit the stated criteria.

    Removing Lane Guidance

    To remove Lane Guidance, simply select the lanes tab for the segment, then edit lane guidance, then change the number of lanes to zero (0).