Driving Restrictions

Driving restrictions are controlled by the RSTR attributes. The attribute value is a string composed of one or more fields, which are separated by semicolons:

• Restriction type (required)
• Restriction type arguments (requirements vary by restriction, see table below)
• Vehicle list (optional)
• Link ID list (requirements vary by restriction, see table below)
• Location (optional)

Each of these fields is explained below. Driving restrictions can be further modified through the use of date/time modifiers.

Restriction Type

Type

Arguments

Toll Booth

Name	Meaning	Example
None	Do not enunciate toll booth.	Toll Booth
enunciated	Enunciated toll booth.	Toll Booth: enunciated

Provide one of the above arguments.

Requires one additional Link ID.

Construction Status

Name	Meaning	Example
open	Road is open.	Construction Status: open
closed	Road is closed.	Construction Status: closed

Provide one of the above arguments.

Gate

Name	Meaning	Example
key access	Gate requires a key to enter.	Gate: key access
permission required	Gate requires permission to enter.	Gate: permission required
emergency vehicle access	Gate allows emergency vehicles.	Gate: emergency vehicle access

Provide one of the above arguments.

Requires one additional Link ID.

Direction of Travel

Name	Meaning	Example
from reference node	Direction of travel is from the reference to end node.	Direction of Travel: from reference node
to reference node	Direction of travel is toward the reference node.	Direction of Travel: to reference node
both directions	Direction of travel is in both directions.	Direction of Travel: both directions

Provide one of the above arguments.

Carpool

Name	Meaning	Example
minimum passengers: number	The number of passengers required for a carpool.	Carpool: minimum passengers: 4

Provide one of the above arguments.

Turn Restriction

Name	Meaning	Example
legal	The turn is legally prohibited.	Turn Restriction: legal
physical	The turn is physically prohibited.	Turn Restriction: physical
logical	The turn is logically prohibited.	Turn Restriction: logical

Provide one of the above arguments.

Name	Meaning	Example
dawn to dusk	Restriction is only enforced from dawn to dusk.	Turn Restriction: legal, dawn to dusk
dusk to dawn	Restriction is only enforced from dusk to dawn.	Turn Restriction: legal, dusk to dawn

Optionally, provide one of the above arguments.

Requires at least one additional Link ID, up to thirty additional Link IDs may be given.

Access Restriction

Name	Meaning	Example
None	No seasonal closure	Access Restriction
seasonal closure	Approximate seasonal closure	Access Restriction: seasonal closure

Provide one of the above arguments.

Special Explication

Requires one additional Link ID.

No Explication

Requires one additional Link ID.

Special Speed Situation

Name	Meaning	Example
advisory	Special advised speed.	Special Speed Situation: advisory, speed: 25
school	Special speed near a school.	Special Speed Situation: school, speed: 5
rain	Special speed when raining.	Special Speed Situation: rain, speed: 25
snow	Special speed when snowing	Special Speed Situation: snow, speed: 15
time dependent	Special speed during certain times. Note: Times are given as associated date/time modifiers.	Special Speed Situation: time dependent, speed: 45
seasonal	Special speed during certain season. Note: Season is given as an associated date/time modifier.	Special Speed Situation: seasonal, speed: 30
lane dependent	Special speed for specific lanes.	Special Speed Situation: lane dependent, speed: 25
speed bumps	Special speed bumps speed.	Special Speed Situation: speed bumps, speed: 5
vehicle dependent	Special speed for certain vehicle types. Note: Vehicles are given in the "Applied To" field.	Special Speed Situation: vehicle dependent, speed: 45

Provide one of the above arguments. Note: No speed unit (i.e. mph or kph) is needed, the unit is determined by the road SPD_FORMAT attribute.

Name	Meaning	Example
speed: number	The special speed.	Special Speed Situation: school, speed: 10

This argument is required.

Variable Speed Sign

Name	Meaning	Example
left	Sign on left.	Variable Speed Sign: left
right	Sign on right.	Variable Speed Sign: right
overhead	Sign is overhead.	Variable Speed Sign: overhead

Provide one of the above arguments.

Requires one additional Link ID.

Usage Fee Required

No additional requirements.

Rest Area

Requires one additional Link ID. Note: This is used only in certain Asian products in highway mode to detect when an exit is for a rest area.

Lane Connection

See lane connection documentation here.

Junction View

Requires at least one additional link. See junction view documentation here.

Vehicle List

By default a driving restriction will be applied to all vehicle types; however, to limit the restriction to only certain vehicle types a list of vehicle types can be supplied in the "Applies To" field.

Vehicle Type Name

Automobile

Bus

Taxi

Carpool

Pedestrian

Bicycle

Truck

Through Traffic

Delivery

Emergency Vehicle

For example, to limit a restriction to buses and trucks the text "Applies To: Bus, Truck" would be added to the driving restriction.

Link ID List

Some driving restrictions require one or more associated link IDs which are given in the "Link ID" field. For example, to associate links 1234 and 2468 with a particular driving restriction the text Link ID: 1234, 2468 would be added to the driving restriction.

Location

By default, a driving restriction is applied across the entire link; however, the restriction can be limited to either the start node or the end node in the "Where" field. For example, to limit the application of a driving restriction to only the start node of the link the text "Where: start" would be added to the driving restriction, or "Where: end" to limit the restriction to the end node.

Putting It All Together

The fields of a driving restriction are separated by a semi-colon character. The fields may appear in any order and are case insensitive. For example:

1. Turn Restriction: Physical; Applies To: Bus, Truck; Link ID: 1234; Where: End
2. applies to: truck; link id: 1559, 3486, 2121; special speed situation: advisory, speed: 45, dusk to dawn

Both of the above driving restrictions are valid.

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