HERE Map Content Developer's Guide

Divider

Definition

Divider identifies a physical structure or painted road marking intended to legally prohibit left turns in right-side driving countries, right turns in left-side driving countries, and U-turns at divided intersections or in the middle of divided segments.

Note: Traffic Laws and Regulations for the administrative area determine whether road markings (lane divider markers) should be represented as Legal Dividers.

Usage

Enables a system to prevent left turns (in right-side driving countries), right turns (in left side driving countries), and U-turns at divided intersections and in the middle of divided roads.

Rules

  • Divider is applied as follows:
    • "REF_NODE_AND_LINK" - The road segment is divided and left turns (in right-side driving countries), right turns (in left-side driving countries), and U-turns are not allowed from the divided road segment to any segment at the Reference Node.
    • "NREF_NODE_AND_LINK" - The road segment is divided and left turns (in right-side driving countries), right turns (in left-side driving countries), and U-turns are not allowed from the divided road segment to any segment at the Non-Reference Node.
    • "BOTH_NODES_AND_LINK" - The road segment is divided and left turns (in right-side driving countries), right turns (in left-side driving countries), and U-turns are not allowed from the divided road segment to any segment at either node.
    • "LINK_ONLY" - The road segment is divided and turns are allowed at either node of the divided road segment. U-turns are not allowed along the divided road segment.
    • "NO_DIVIDER" - The road segment is not divided and it is navigable.
  • See the figure below for examples:
Figure 1. Divided Junction

  • Restricted Driving Manoeuvre conditions are not applied for situations where Divider coding exists. Therefore the Divider coding should be interpreted into restricted driving manoeuvres in order to have correct driving instructions.

  • No divider coding is applied if the divider only exists in a node, Restricted Driving Manoeuvres are applied instead.

  • Is Legal Divider = N in combination with Divider = 1, 2, A, L: the divider is a physical barrier that cannot be traversed.

  • Is Legal Divider = N only has a meaning if Divider ≠ N.

  • Is Legal Divider = Y in combination with Divider = 1, 2, A, L: the divider is a physically passable barrier, such as painted lines, that prohibits traversal by statute only.

  • If a divider is larger than 3 meters wide, then the opposing lanes of traffic are separately digitised, and each road segment is applied with Multiply Digitised instead of Divider coding.

  • Physical or painted dividers that only restrict driving manoeuvres at intersections are coded using Restricted Driving Manoeuvre conditions.

  • If a road segment has Divider = 1, 2, or A, then the adjacent road segment also has Divider = 1, 2, or A.

  • In the example below, a painted divider (Is Legal Divider = Y) goes through the intersection. The following manoeuvres are prohibited in reality:

    • road segment 1 to road segment 3

    • road segment 2 to road segment 4

    • road segment 3 to road segment 2

    • road segment 3 to road segment 4

    • road segment 4 to road segment 1

    • road segment 4 to road segment 3

    • road segment 1 to road segment 1 (No U-turn)

    • road segment 2 to road segment 2 (No U-turn)

      Figure 2. Representations of a Divided Junction

      Road segment 1:

    • Divider = '2' (Non Ref Node and Link are Divided) and

    • Is Legal Divider = 'Y'.

    • Divider Type = Legal

      Road segment 2:

    • Divider = '1' (Ref Node and Link are Divided) and

    • Is Legal Divider = 'Y'.

      An emergency vehicle would be able to make any of the turns restricted here when necessary.

  • Divider coding alone does not prevent all illegal driving manoeuvres when two or more non-divided road segments connect at the same node to a divided road segment on the same side. “Link only” dividers (Divider = L) and manoeuvres are applied to indicate restricted manoeuvres.

    Figure 3. Link Only Divider