TIM Performance by Roadway Type

Many TMCs only operate on the freeway system (and sometimes primarily interstate highways only); however, incidents occur on every type of facility, including state highways, arterial streets, and collector/distributor routes. Therefore a comparison of performance from one region that is based on TMC (freeway) incident data only to performance from another region that is based on law enforcement data covering multiple types of roadway may be misleading. As such, reporting TIM performance by roadway type (interstate highways, state highways, arterials, etc.) will aid in making appropriate comparisons.