Advanced Roads

The Advanced Roads layer extends the roads layer with premium properties that offer enhanced map functionality specifically tailored for heavy goods vehicles (HGVs). These premium properties provide valuable information to optimize routes, improve navigation, and ensure compliance with HGV-specific requirements.

You can request this layer by specifying the following additional query parameter: content=default,advanced_roads.

The Advanced Roads layer content has the following definition:

• Layer name: roads_hgv
• Geometry types: line, point

This layer contains the same data as the roads layer, with the following new properties:

• toll_hgv - An optional boolean property that indicates whether a toll applies to certain classes of heavy goods vehicles. This property is present only when its value is true.
• toll_hgv_time_restrictions - An optional property that is always paired with the toll_hgv property and indicates the time period when a HGV access fee is collected.

The following figure provides a sample road feature extended with advanced properties:

In this example, as indicated by the advanced toll_hgv and toll_hgv_time_restrictions properties, a fee applies to HGV vehicles during specific hours, weekdays, and months, as specified in the Time Domain format.

The Advanced Roads layer also expands on the hgv_restriction property by introducing additional values related to weight restrictions and axle configurations for heavy goods vehicles (HGVs). The following list provides a breakdown of these extended values:

Weight Restrictions:

• wpan_two_axles - Specifies the weight limit for HGVs with two axles.
• wpan_three_axles - Specifies the weight limit for HGVs with three axles.
• wpan_four_axles - Specifies the weight limit for HGVs with four axles.
• wpan_five_axles - Specifies the weight limit for HGVs with five axles.
• wpan_six_axles - Specifies the weight limit for HGVs with six axles.
• wpan_two_or_more_axles - Specifies the weight limit for HGVs with two or more axles.
• wpan_three_or_more_axles - Specifies the weight limit for HGVs with three or more axles.
• wpan_four_or_more_axles - Specifies the weight limit for HGVs with four or more axles.
• wpan_five_or_more_axles - Specifies the weight limit for HGVs with five or more axles.
• wpan_six_or_more_axles - Specifies the weight limit for HGVs with six or more axles.

Weight per Axle Group:

• wpag_single_axle - Indicates the weight limit per axle group for HGVs with a single axle group.
• wpag_tandem_axle - Indicates the weight limit per axle group for HGVs with tandem axle groups.
• wpag_triple_axle - Indicates the weight limit per axle group for HGVs with triple axle groups.
• wpag_quad_axle - Indicates the weight limit per axle group for HGVs with quad axle groups.
• wpag_quint_axle - Indicates the weight limit per axle group for HGVs with quint axle groups.

Prohibited Axle Groups:

• axles_group_single_axle - Prohibited access for HGVs with a single axle group.
• axles_group_tandem_axle - Prohibited access for HGVs with tandem axle groups.
• axles_group_triple_axle - Prohibited access for HGVs with triple axle groups.
• axles_group_quad_axle - Prohibited access for HGVs with quad axle groups.
• axles_group_quint_axle - Prohibited access for HGVs with quint axle groups.

These extended values provide detailed information regarding weight restrictions, weight restrictions per axle group, and prohibited access for specific axle configurations. These values enable users to accurately assess whether their HGVs comply with weight restrictions and whether certain axle configurations are allowed on particular roads or within specific areas.

Next steps

• For more information about other layer feature types available in the HERE Vector Tile API, see Tile Layers.