Modifier Category Descriptions

Height restriction:

The maximum height allowance for a truck to travel on a road, bridge, through a tunnel, or other. A standard truck has a height of 13'6" and is legal on most truck designated routes. However, every state has their own maximum height restriction for trucks.

Choosing this category will result in routes that avoid the part of the road segment where the height restriction is located.

This category requires that you specify the Maximum vehicle height measured in feet.

Weight restriction:

The maximum weight allowance for a truck to travel on a road, through a tunnel, or on a bridge. Weight limits are the legal limits provided by the Federal laws in the US. The maximum weight for a truck is 80,000 lbs or 40 tons.

Choosing this category will cause the affected road segments to not be used for routing. Alternate road segments are used for route generation.

This category requires that you specify the Maximum gross vehicle weight measured in pounds.

Turn restricted:

The length limit for trucks to make a turn.

This road modifier category will prevent routes from travelling along all of the road segments identified using this road modifier from start to finish. This road modifier is generally used to restrict a turn. Routes may still use the affected road segment(s) as long as the route does not travel from the start to the end of the road modifier along the affected roads. For example, you can use this category to restrict a left hand turn without affecting right hand turns at the intersection.

This category requires that you specify the Maximum overall vehicle length measured in feet. The modifier is then only applied to vehicles longer than the specified length.

This category requires that the Affected Roads contains between 2 and 8 road links.

Per axle weight restriction:

The weight limit for each size of truck. A single axle: 20,000 ; double axle: 34,000 ; triple axle: 45,000 ; 4 axle: 66,000 ; 5 axle: 80,000

Choosing this category will cause the affected road segments to not be used for routing. Alternate road segments are used for route generation.

This category requires that you specify the Maximum gross vehicle weight per axle measured in pounds.

Length restriction:

The length limit for a truck to travel on a road, bridge or tunnel. The limit for a standard truck is 53 feet. However, every state has their own length limits. Trailer lengths up to 59.5 feet are legal in some states.

Choosing this category will cause the affected road segments to not be used for routing. Alternate road segments are used for route generation.

This category requires that you specify the Maximum overall vehicle length measured in feet.

Width restriction:

The width limit for trucks to travel on a road, bridge or through a tunnel.

Choosing this category will cause the affected road segments to not be used for routing. Alternate road segments are used for route generation.

This category requires that you specify the Maximum vehicle width measured in feet.

Allow restricted turn:

This road modifier category will allow a turn that is restricted according to the NavTeq data.

This category requires that the Affected Roads contains between 2 and 8 road links.

Trucks prohibited:

Indicates that the affected road segment(s) are not recommended for truck travel.

This road modifier discourages the use of the affect road segment(s) in route generation. Instead, alternate road segments are used for route generation.

Turn restricted:

This road modifier category will prevent all vehicles from travelling along all of the road segments identified using this road modifier from start to finish. This road modifier is generally used to restrict a turn. Routes may still use the affected road segment(s) as long as the route does not travel from the start to the end of the road modifier along the affected roads. For example, you can use this category to restrict a left hand turn without affecting right hand turns at the intersection.

This category requires that the Affected Roads contains between 2 and 8 road links.

DOT mandated detour:

Indicates a road/route that is a recommended detour route.

This road modifier category will strongly encourage the use of the road segment for routing.

Truck network [FAV]:

Indicates that the affected roads are part of the Truck Network, and therefore should be favoured during route generation.

This road modifier category will strongly encourage the use of the road segment(s) for routing.

Avoid residential area:

Indicates that the affected road links are in a residential area, and therefore should be avoided during route generation.

This road modifier category will strongly discourage the use of the affected road segment(s) for routing. Alternate road segments are used for routing when feasible.

No trucks:

Indicates that a sign is posted on the road(s) that states that no trucks are allowed to travel on the road.

This road modifier category discourages the use of the road segment in route generation. These road segments are avoided as long as a decent alternate route is available.

This category requires that you specify the Maximum gross vehicle weight measured in pounds. This road modifier applies when the vehicle weighs more than the specified weight.

No trailers:

Indicates that a sign is posted on the road that states no trailers are allowed to travel on the road.

This road modifier category discourages the use of the road segment in route generation. Road segments containing these category road modifiers are avoided as long as a decent alternate route is available.

This category requires that you specify the Maximum gross vehicle weight measured in pounds. This road modifier applies when the vehicle weighs more than the specified weight.

No trucks (except residents):

Indicates that no trucks are allowed to travel on a road, with the exception of residents.

This road modifier category discourages the use of the road segment in route generation. Road segments containing these category road modifiers are avoided as long as a decent alternate route is available.

This category requires that you specify the Maximum gross vehicle weight measured in pounds. This road modifier applies when the vehicle weighs more than the specified weight.

HazMat restriction:

Indicates that trucks are restricted from travelling on the road if they are carrying hazardous materials.

This category requires that you specify the Comma-separated list of HazMat classes (e.g. 1,4,7).

HazMat designated route:

Indicates that the road is suitable for trucks carrying hazardous materials of the specified types.

This road modifier category encourages the use of the affected road segments while generating HazMat routes.

This category requires that you specify the Comma-separated list of HazMat classes (e.g. 1,4,7) that can be transported on the specified roads.

Trucks prohibited (parkway):

This modifier indicates that trucks are not permitted on the parkway road.

Border crossing:

This modifier applies a penalty to border crossings to deter routes from crossing back and forth across the Canada/US border for routes that do not have destinations in both countries. This modifier is useful for avoiding border wait times. In addition, trucks carrying domestic loads may not carry the required legal paperwork to cross borders.

This modifier category strongly discourages the use of the affected road segments in route generation. Alternate road segments are used for routing unless no other route is possible.

Ferry:

This modifier applies a penalty to ferry crossings to deter routes from using ferries if at all possible. This modifier is useful for avoiding ferry wait times.

This modifier category strongly discourages the use of the affected road segments in route generation. Alternate road segments are used for routing unless no other route is possible.

Beltway:

This modifier encourages the use of beltway highways over inner-city highways. Beltway highway examples: I-695 in Baltimore, I-285 in Atlanta.

Unblock ferry:

This modifier prevents the avoidance of ferries on routes.

This modifier category encourages the use of the affected road segments in route generation.

Preferred approach to location (small) [FAV]:

Indicates that the affected road segments are a preferred approach to a location.

This road modifier category slightly encourages the use of the road segment for routing.

Preferred approach to location (medium) [FAV]:

Indicates that the affected road segments are a preferred approach to a location.

This road modifier category encourages the use of the road segment for routing.

Preferred approach to location (large) [FAV]:

Indicates that the affected road segments are a preferred approach to a location.

This road modifier category strongly encourages the use of the road segment(s) for routing.

Toll favor [FAV]:

Indicates that the affected road segments have a toll, and should be favored during route generation.

This road modifier category encourages the use of the road segments for routing.

Toll avoidance:

Indicates that the affected road segments have a toll, and should be avoided.

This road modifier category discourages the use of the road segments for routing.

Fleet efficiency (small):

Indicates that the affected road segments should be slightly avoided.

This road modifier category slightly discourages the use of the road segments for routing.

Fleet efficiency (medium):

Indicates that the affected road segments should be avoided.

This road modifier category discourages the use of the road segments for routing.

Fleet efficiency (large):

Indicates that the affected road segments should be strongly avoided.

This road modifier category strongly discourages the use of the road segments for routing.

Avoid construction:

This category is used to indicate that the specified road segments are construction zones and should be avoided.

This road modifier category will strongly discourage the use of the affected road segment(s) for routing. Alternate road segments are used for routing when feasible.

Closed for construction:

Indicates that a road or route is closed due to construction.

Choosing this category will cause the affected road segments to not be used for routing. Alternate road segments are used for route generation.

Detour [FAV]:

Indicates that a road or route is a favored detour.

This road modifier category will encourage the use of the affected road segment(s) for routing.

Seasonal poor road:

Indicates that the affected road segment(s) offer poor road conditions on a seasonal basis.

This road modifier category will discourage the use of the affected road segment(s) for routing.

Seasonal detour [FAV]:

Indicates that the affected road segment(s) offer a detour that is useful on a seasonal basis.

This road modifier category will encourage the use of the affected road segment(s) for routing.

Weather avoidance:

Indicates that the affected road segment(s) should be avoided due to weather conditions.

This road modifier category will discourage the use of the affected road segment(s) for routing.

Weather detour [FAV]:

Indicates that the affected road segment(s) offer a detour that is useful to avoid weather conditions.

This road modifier category will encourage the use of the affected road segment(s) for routing.

Safety issues (small):

This road modifier indicates that there may be safety issues on the affected road(s).

This road modifier category slightly discourages the use of the road segment(s) for routing.

Safety issues (medium):

This road modifier indicates that there may be safety issues on the affected road(s).

This road modifier category discourages the use of the road segment(s) for routing.

Safety issues (large):

This road modifier indicates that there may be safety issues on the affected road(s).

This road modifier category strongly discourages the use of the road segment(s) for routing.

Data error avoidance:

This road modifier indicates that there is a data error on the affected road segment(s), and the roads should be avoided during route generation.

This road modifier category discourages the use of the road segment(s) for routing.

Data error [FAV]:

This road modifier indicates that there is a data error on the affected road segment(s), and the roads should be favored during route generation.

This road modifier category encourages the use of the road segment(s) for routing.

Data error - no through traffic:

This road modifier indicates that there is a data error on the affected road segment(s). The affected road segment(s) should be avoided during route generation because no through traffic is allowed.

This road modifier category strongly discourages the use of the road segment(s) for routing.

Data error - directionality:

This road modifier indicates that there may be a data error related to the directionality of the affected road segment(s).

This modifier should be used if a road is one-way but the direction is incorrect.

This road modifier category forbids the use of the road segment(s) for routing.