Network Attribute Assignment Rules¶

OSM Attribute Assignment Rules¶

The following rules are used during the initial data download and network generation. The tool scans OSM tags to determine if a mode is allowed,

Access & Permissions¶

Highway	Vehicle	Truck^	Pedestrian	Low Stress Pedestrian	Bicycle	Low Stress Bicycle
motorway	all	all	never*	never*	never*	never*
trunk	all	all	never*	never*	if bike lane*	if separated bike lane only*
primary	all	all	all	never*	all	if separated bike lane only*
secondary	all	all	all	never*	all	if separated bike lane only*
tertiary	all	all	all	never*	all	if bike lane*
residential	all	never	all	all	all	all
service	never	never	never	never	never	never
unclassified	all	all	all	all	all	if bike lane*
living street	all	never	all	all	all	all
cycleway	never	never	all	all	all	all
track	never	never	all	all	all	all
footway	never	never	all	all	all	all
corridor	never	never	all	all	never	never
steps	never	never	all	all	all	never
path	never	never	all	all	all	all

Default Speeds (mph)¶

Highway	Vehicle Spd	Truck Spd^	Pedestrian Spd	Bicycle Spd	Low Stress Bicycle Spd
motorway	55	52.25	3	10*	10*
trunk	35	33.25	3	10*	10*
primary	25	23.75	3	10	10*
secondary	25	23.75	3	10	10*
tertiary	25	15	3	10	10*
residential	20	0	3	10	10
service	0	0	3	10	10
unclassified	25	15	3	10	10*
living street	10	0	3	10	10
cycleway	0	0	3	10	10
track	0	0	3	10	10
footway	0	0	3	3	3
corridor	0	0	3	3	3
steps	0	0	3	3	3
path	0	0	3	3	3

Condition Notes:

* Pedestrian & Bike Inclusion: These links are included if there are pedestrian infrastructure tags associated with the link. For the bicycle network, these links are set at a speed limit of 3 if they were not already included.

^ Truck Routing: rucks are allowed on highway types marked “all” assuming they meet the conditions listed in Freight Truck Assignment Rules below. These rules also explain how truck speeds are assigned.

Manual Edit Integration Defaults (Auto-Population)¶

When you manually draw or copy links into a scenario and leave mode or speed fields blank, the tool applies the conservative defaults below based on the “highway” field during Step 2C: Integrate Scenario. For default speeds, the tool applies the speeds listed in the table below. Note that this this "auto-population" of blank fields will only work if there is a known value in the "highway" field.

Defaults for Auto-Population¶

Highway	Vehicle	Truck	Pedestrian	Low Stress Pedestrian	Bicycle	Low Stress Bicycle
motorway	Yes	Yes	No	No	No	No
trunk	Yes	Yes	No	No	No	No
primary	Yes	Yes	Yes	No	Yes	No
secondary	Yes	Yes	Yes	No	Yes	No
tertiary	Yes	Yes	Yes	Yes	Yes	No
residential	Yes	No	Yes	Yes	Yes	Yes
service	No	No	No	No	No	No
unclassified	Yes	Yes	Yes	Yes	Yes	Yes
living street	Yes	No	Yes	Yes	Yes	Yes
cycleway	No	No	Yes	Yes	Yes	Yes
track	No	No	Yes	Yes	Yes	Yes
footway	No	No	Yes	Yes	Yes	Yes
corridor	No	No	Yes	Yes	No	No
steps	No	No	Yes	Yes	Yes	No
path	No	No	Yes	Yes	Yes	Yes

Freight Truck Assignment Rules¶

The truck network is built from the vehicle network but introduces specific restrictions and penalties.

Prohibited Links

Removes residential and living streets from the truck network.
Removes links where the hgv tag is marked “no” or “discouraged”.
Removes links where hgv is tagged as “conditional” with a subtag value containing “permit” (hinting at a permit requirement).

Physical Restrictions

The tool checks for a 'maxheight', 'maxweight', or 'maxwidth' tag. If values hint at no restriction (e.g., no, unsigned, etc.), the link passes. Otherwise, the link is removed if any of the following constraints apply:

'maxheight' is over 13’6”.
'maxweight' is over 80k lbs.
'maxwidth' is over 8’6”.

Speed Modifications

Soft Penalties: Includes soft speed penalties (50% of normal vehicle speed) for links where the hgv tag is marked “destination,” “delivery,” or “local,” as these signal that these roads should be avoided for pass-through routing.
Hard-coded Limitations: Assigns hard-coded speeds of 15 mph for any tertiary or unclassified links (to discourage their use and to reflect slower speeds when navigating these lower classification roads).
General Throttle: Throttles down all typical vehicle speeds by 5%.