01473216

Component

Visibility is a critical component to the task of driving on all types of roads. The visibility detection and warning systems provide real-time, automated detection as well as appropriate responses to counteract reduced visibility conditions due to fog, heavy rain, snow, smoke, dust or haze by informing drivers of present conditions and lowering the speed limits to match the reduced visibility condition. The objective of this research is to provide a synthesis of visibility detection systems and traffic control techniques that are developed and/or implemented in the US and around the world. This paper provides an overview of the best practices of fixed visibility systems at areas of recurrent dense fog and mobile systems for seasonal visibility reduction for areas of predicted seasonal fog or smoke from wildfires. Ongoing research efforts of developing new camera-based visibility detection systems are also discussed.

This paper was sponsored by TRB committee AND40 Visibility.

01470560

13-0832

English

17p

2013

Transportation Research Board 92nd Annual Meeting

Digital/other

Maps; References; Tables

Best practices; Detection and identification systems; Fog; Smoke; Speed limits; Traffic control; Visibility; Warning systems

Highways; Safety and Human Factors; I83: Accidents and the Human Factor; I85: Safety Devices used in Transport Infrastructure

Transportation Research Board Annual Meeting 2013 Paper #13-0832

TRIS, TRB, ATRI

Feb 5 2013 12:17PM