V15. Total Lanes in Roadway
Total number of lanes in the roadway on which this motor vehicle was traveling.
For undivided highways:
Enter the total through lanes in both directions, excluding designated turn lanes.
For divided highways:
Enter the total through lanes for the roadway on which the motor vehicle under consideration was traveling. See Appendix E for diagram of the trafficway.
Used in studying roadway safety issues as well as identifying the environment of a particular crash.