The option selected should be based on the location of the first harmful event and is only applicable to intersection or intersection-related crashes.
Intersection refers to an area which 1) contains a crossing or connection of two or more roadways not classified as driveway access and 2) is embraced within the prolongation of the lateral curb lines, or, if none, the lateral boundary lines of the roadways. Where the distance along a roadway between two areas meeting these criteria is less than 30 feet, the two areas and the roadway connecting them are considered to be parts of a single intersection.
01 - Not at Intersection select this option when the location of the first harmful event is not an intersection.
02 - Four-Way Intersection refers to two roadways which cross or connect.
 One-Way versus One-Way Example |
 Two-Way versus Two-Way Example |
03 - T-Intersection refers to an intersection where two roadways connect and one roadway does not continue across the other roadway. The roadways form a "T".
 Signalized "T" Intersection |
 Unsignalized "T" Intersection |
04 - Y-Intersection refers to an intersection where three roadways connect and none of the roadways continue across the other roadways. The roadways form a "Y".
05 - L-Intersection refers to an intersection where two roadways connect and neither roadway continues across the other roadway. The roadways form an "L". (Example: 8th Street and N Street in Anchorage. See the following image.)
06 - Roundabout refers to an intersection of roads where motor vehicles must travel around a circle to continue on the same road or leave on any intersecting road. (See the following diagram.)
Example of a typical single-lane roundabout
A 06 - Roundabout must meet the following criteria:
- Entering traffic is controlled by a yield sign only
- Circulating traffic has the right of way
- Pedestrian access is allowed behind the yield sign line
- No parking is allowed in the circle
 Example of Freeway Interchange Roundabouts |
 Example of Single Lane Roundabout |
07 - Five-Point, or More refers to an intersection where more than two roadways cross or connect.
Example of 5 Point intersection
99 - Unknown is used when the intersection type is not known.
