Road Link attribution

Details about the Bus Lane Presence attribution available in the Road Link Feature Type.

The Road Link Feature Type can be found in the OS Transport Network Collection of the OS NGD Transport Theme. This feature type represents line geometry for Great Britain’s road system and provides a routable network when used in conjunction with the Road Node Feature Type.

Attribution is provided against Road Links (data schema version 5.0 onward) to indicate the presence of bus lanes; you can use the data to see if there is bus lane infrastructure present along a road or path and quantify how much there is.

Please note that bus lane infrastructure is often disconnected in the real world, which will impact the continuity of the Bus Lane Presence attribution.

Example image showing bus lane presence along a Road Link. A background map has been included to provide context.

Key attribution

Key Bus Lane Presence attribution on the Road Link Feature Type includes:

• Overall Presence and Percentage​: Indicate the length (in metres) and the percentage of the Road Link that has a bus lane present on it. (Presence Of Bus Lane Overall M and Presence Of Bus Lane Overall Percentage attributes.)

• In Direction Presence and Percentage​: Indicate the length (in metres) and the percentage of the Road Link that has a bus lane present on it that can be traversed in the direction of digitisation of the Road Link. (Presence Of Bus Lane In Direction M and Presence Of Bus Lane In Direction Percentage.)

• In Opposite Direction Presence and Percentage​: Indicate the length (in metres) and the percentage of the Road Link that has a bus lane present on it that can be traversed against the direction of digitisation of the Road Link. (Presence Of Bus Lane In Opposite Direction M and Presence Of Bus Lane In Opposite Direction Percentage.)

Note about percentages

Please note that percentage values are given to the nearest whole percent (for example, 15% not 14.8%). In cases where only a very small length of Bus Lane is associated with a Road Link, the percentage value will be rounded to 0% if the length is less than 0.5% of the length of the Road Link; therefore, you may see a small number of instances where a length in metres is populated but the percentage is 0%.