Study shows curve warning systems ‘reduce crashes’

A study by the US Federal Highway Administration’s Highways for Life has found a small but consistent reductions in mean and 85 percentile speeds on dangerous bends through the use of Tapco’s BlinkerChevron dynamic curve warning and guidance system (DCWGS) instead of static warning signs. The system's detects oncoming vehicles up to 90m (300ft) from the curve and will trigger the flashing LEDs on the signs if the vehicle’s speed exceed a predetermined level to warn the driver of the dangerous curves with e
February 24, 2016 Read time: 2 mins
RSSA study by the US Federal Highway Administration’s Highways for Life has found a small but consistent reductions in mean and 85 percentile speeds on dangerous bends through the use of 989 Tapco’s BlinkerChevron dynamic curve warning and guidance system (DCWGS) instead of static warning signs.

The system's detects oncoming vehicles up to 90m (300ft) from the curve and will trigger the flashing LEDs on the signs if the vehicle’s speed exceed a predetermined level to warn the driver of the dangerous curves with each chevron flashing sequentially.

Set up to examine improving safety performance on rural horizontal curves, the study concluded that ‘overall, the sign appeared to be effective in reducing speed and crashes’. Analysis showed a reduction in vehicles exceeding the speed limit or advisory speed limit by 5, 10, 15, or 20 mph, and particularly in the higher ranges.

Air Quality & Weather Systems

For more information on companies in this article

Related Content

  • The benefits of Lidar
    March 21, 2022

    While Lidar is gaining ground in the ITS industry, it has not yet reached the level of mass adoption where it shows up frequently in requests for proposals (RFPs) from cities and DoTs.

    Read More
  • Machine vision’s image of road management’s future
    June 11, 2015
    Q-Free’s Marco Sinnema looks at how the commoditisation of high-quality vision-based solutions is widening their application. Machine vision technology’s entry into the ITS/traffic management sector has followed a classic top-down path. This is unsurprising given the extremely demanding performance criteria which are the standard in its market of origin, manufacturing processing. Very high image qualities combined with frame rates often in the hundreds per second range resulted in vision systems with capabi
    Read More
  • Speed indicator devices improve safety at landfill site
    May 14, 2012
    UK company Traffic Technology Limited has announced significant speed reductions at the Lochhead Landfill site, in Scotland, following the deployment of four SIDs (Speed Indicator Devices) as part of on-going health and safety improvements. The devices are installed at the site entrance and at three other points on the main waste vehicle access route to detect and inform drivers of their speed. Since being installed, the units have been instrumental in greatly reducing speeding on the site. According to Pe
    Read More
  • Truck platooning trials take to the highways
    July 24, 2017
    There is rising enthusiasm in America and beyond for the concept of truck platooning with trials being planned in several US states, as David Crawford reports. Growing numbers of US states are considering or implementing plans for trials of electronically-linked truck platooning on public road networks. This is in response to the interest being shown by the US$70bn a year road freight industry, where fuel represents 41% of the operating costs making the prospect of improving fuel economy by trucks travellin
    Read More

Highlighted Content