- Accident history at that intersection
- Visibility conditions
- Vehicular and pedestrian conflicts
- Unusual condition i.e., Any facility that generates an unusually high concentration of traffic volume of vehicles and/or pedestrians;
- regular use of the intersection by school age children, elderly or handicapped pedestrians;
- speeding motorists;
- unique geometrics;
- Visible signs of potential traffic problems, e.g., skid marks, evidence of fixed object collisions.