Skip to main content

Caltrans reflects latest safety policy

After recent studies, California DoT is reviewing its highway design standards
By David Arminas August 7, 2020 Read time: 1 min
Caltrans has installed two-way reflective markers to prevent potentially fatal mistakes (image credit: Caltrans)

Recent pilot programmes by California’s Department of Transportation - Caltrans – and a university research centre highlight effective measures that have been taken on board by the US state.

The pilot was developed following 10 wrong-way driver related collisions on freeways around the cities of Sacramento and San Diego in the first six months of 2015.

Caltrans engaged the University of California’s Davis Advanced Highway Maintenance and Construction Technology (AHMCT) Research Center to gather data on the rare but often deadly wrong-way driving collisions.
 
One of the prevention measures included in the three-year pilot programme was reflectors that alert drivers who are entering the roadway in the wrong direction - leading to a 44% drop in such offences in San Diego.
 
“Adding the two-way reflective markers proved to be so effective that Caltrans updated its state-wide design standards,” said Toks Omishakin, Caltrans director. 

During the study, Caltrans installed and tested different ways to deter wrong-way drivers along exit ramps in San Diego as well as the city of Sacramento.

There will be more on this story in the North America edition of ITS International September/October 2020 

For more information on companies in this article

Related Content

  • OCTA seeks proposals from three teams for I-405 freeway project
    March 31, 2016
    The Orange County Transportation Authority, California, is seeking proposals from a shortlist of firms for the design and construction of the I-405 Improvement Project, an important step toward building a better freeway that is intended to improve travel times for those driving the corridor between Costa Mesa and the Los Angeles County line. The OCTA Board of Directors has unanimously approved the criteria for selecting a firm to design and build the freeway improvements and approved issuing the final re
  • USDoT looks at the costs and potential benefits of connected vehicles
    October 26, 2017
    David Crawford looks at latest lessons learned from the trials of connected vehicles in the US. The progress of connected vehicle (CV) technologies takes centre stage among the hot topics highlighted in the September 2017 edition – the first since 2014 – of the ‘ITS Benefits, Costs and Lessons Learned’ survey from the US ITS Joint Program Office (JPO). The organisation is an arm of the US Department of Transportation (USDoT).
  • Intelligent lane control signals help direct driver behaviour
    November 21, 2012
    As part of a larger effort exploring the effects of roadway signage on driver behaviour, researchers from the University of Minnesota College of Design have conducted a study on the effectiveness of intelligent lane control signals (ILCS). During the study, was funded by the Minnesota Department of Transportation (MnDOT), the research team used a driving simulator to test ILCS that displayed merge, speed control, and lane-closure warnings over freeway lanes. The researchers were specifically interested in d
  • Frequency changes threaten vehicle safety applications
    January 24, 2012
    The use of frequency spectrum at 5.9GHz for vehicle safety applications is at risk because of two draft bills currently before Congress. Here, we look at why and what’s being done to address the issue. In the US, the right of cooperative infrastructure to use frequency at 5.9GHz is under threat as a result of the proposal of two bills in Congress. The chronology of spectrum allocation for Dedicated Short- Range Communications (DSRC)-based Vehicle-to-Infrastructure (V2I) and Vehicle-to-Vehicle (V2V) safety a