Within these pages, readers can access information regarding the sharing, integration, and management of data to support TIM program performance measurement and management.
TIM is a planned and coordinated process involving public and private sector partners. This includes law enforcement, fire and rescue, emergency medical services, transportation, towing and recovery, and others, who detect, respond to, and remove traffic incidents and restore traffic capacity as safely and quickly as possible.
There are a number of benefits to measuring and monitoring the performance of TIM programs. Performance measurement/management can demonstrate program accountability, process efficiency, and improvements over time. It can lead to improved communications and can support future planning and funding for TIM programs. The FHWA Focus State Initiative (FSI), conducted from 2005 to 2007, was the first multi-state effort to define TIM performance using three core performance measures: 1
- Roadway clearance time (RCT) – the time between the first recordable awareness of an incident (detection/notification/verification) by a responsible agency and first confirmation that all lanes are available for traffic flow.
- Incident clearance time (ICT) – the time between the first recordable awareness and the time at which the last responder has left the scene.
- Secondary crash – beginning at the time of detection of the primary incident where a collision occurs either a) within the incident scene or b) within the queue, including the opposite direction, resulting from the original incident.
FHWA has sponsored additional work towards the institutionalization of the collection and use of these TIM performances nationally, including webinars, multi-state workshops, outreach materials, and a document outlining a process for establishing, implementing, and institutionalizing a TIM performance measurement program. 2
08-119 Research Products:
- 1Owens, N., Armstrong, A., Mitchell, C., & Brewster, R. (2009). Federal Highway Administration Traffic Incident Management Performance Measures Final Report. Washington, DC: U.S. Department of Transportation Federal Highway Administration. Retrieved June 4, 2020, from https://ops.fhwa.dot.gov/publications/fhwahop10010/fhwahop10010.pdf
- 2Pecheux, K. (2015). Process for Establishing, Implementing, and Institutionalizing a Traffic Incident Management Performance Measures Program. Washington, DC: U.S. Department of Transportation Federal Highway Administration. Retrieved June 4, 2020.