Application of Video-aided Mapping in Verifying Signal Violation – A Case in Taiwan

More information

Main author

Woo, T. H.

Co-Authors

-

Type of media

PDF

Publication type

Lecture

Publication year

2009

Publisher

18. EVU Conference, Hinckley

Citation

Woo, T. H.: Application of Video-aided Mapping in Verifying Signal Violation – A Case in Taiwan. 18th EVU Conference, Hinckley (UK) 2009

English, 4 pages, 2 figures, 0 references

The coverage of video surveillance at road intersections may not include clear images of the traffic
signals which are needed to solve a disputed crash involving a signal violation.
A fatal case involving a motor scooter and a jeep colliding in a rural signalised junction was under
investigation by the District Attorney to determine which party violated signal regulation. The video
evidence recorded by nearby surveillance cameras was scrutinised by the court. The video images
provided only views of the minor road and part of the main road. As the original purpose of these
surveillance cameras was for security, it was not surprising that the video images did not directly
cover any of the signals.
However, with the correct signal phase and timing plan at hand, it was possible to use the mapping
technique to test the likelihood of a vehicle passing a red light in a certain direction, by graphically
scaling the time axis and matching the vehicle movements in all directions on parallel axes. There
was a final recommendation presented by an accident investigator to the court which was accepted.