Cyclist/motorist crashes worse at stop/give way junctions

May 24, 2018 by Amanda Weaver, Queensland University of Technology
Credit: Queensland University of Technology

Cyclists are being more seriously hurt in crashes with motor vehicles at intersections with 'Stop' or 'Give-way' signs than at intersections with traffic signals or without any signage, a QUT study has found.

Rabbani Rash-ha Wahi, from QUT's Centre for Accident Research and Road Safety—Queensland (CARRS-Q), analysed 13 years of Queensland police records to investigate how the way traffic was controlled at intersections influenced the injuries to riders in collisions with motor vehicles.

Mr Wahi published his research findings in the Transportation Research Record (TRR): Journal of the Transportation Research Board last week.

"Many studies have identified factors that contribute to bicycle–motor (BMV) crashes, but little is known about determinants of injury severity under different traffic control measures at intersections," said CARRS-Q Director and supervisor of the project, Professor Narelle Haworth.

"Mr Wahi analysed 5,388 police-reported bicycle–motor vehicle crashes at intersections in Queensland from 2002 to 2014 and found almost 40 percent had occurred at junctions with Stop or Give-way signs."

Mr Wahi said one reason for this was that or cyclists have their view obstructed when approaching a give way condition or when leaving from a stopped position.

"In most cases, the bicycle and motor vehicle were approaching each other at right angles and possibly collisions occur because drivers have difficulty with judging gap sizes and speed before deciding whether to enter from the minor road or perform a turning manoeuvre," he said.

Credit: Queensland University of Technology
"What the study found hardly surprises anyone who rides: the driver was considered at fault by police in 63 per cent of bicycle-motor vehicle crashes."

Mr Wahi also found that drivers were most often at fault at intersections with Stop or Give-way signs. Yet drivers and cyclists were equally likely to be at fault when the was controlled by traffic signals.

"However, when cyclists were judged to be at fault in crashes at Stop and Give-way signs and uncontrolled intersections, their injuries were more severe," he said.

"Speed zone appears to have influenced injury severity only at Stop/Give-way signs and may reflect differences in intersection design rather than speed limits as such."

Mr Wahi found cyclists' injuries were more severe in bicycle–motor vehicle crashes at unsigned intersections in hilly areas than in flat areas.

"It may be that cyclists and drivers can't see each other until too late because of the crests and dips, or that they were travelling faster," he said.

"The large number of bicycle motor-vehicle crashes at four-way intersections with traffic lights suggested that cyclists may not have enough time to cross the intersection before motorized cross receives a green light, possibly because signal timing is often based on -vehicle speeds."

Explore further: Better roads essential for safer cycling

More information: Influence of type of traffic control on injury severity in bicycle-motor vehicle crashes at intersections. eprints.qut.edu.au/117418/

Related Stories

Better roads essential for safer cycling

April 6, 2018

A QUT-led study of Queensland motorists and cyclists recommends that efforts to improve cyclist safety during overtaking events should focus on improving roadway infrastructure.

What is a safe following distance?

October 11, 2017

Confusion over what is a "safe following distance" has QUT road safety researchers calling for a standardised definition to prevent tailgating.

Recommended for you

Permanent, wireless self-charging system using NIR band

October 8, 2018

As wearable devices are emerging, there are numerous studies on wireless charging systems. Here, a KAIST research team has developed a permanent, wireless self-charging platform for low-power wearable electronics by converting ...

Facebook launches AI video-calling device 'Portal'

October 8, 2018

Facebook on Monday launched a range of AI-powered video-calling devices, a strategic revolution for the social network giant which is aiming for a slice of the smart speaker market that is currently dominated by Amazon and ...

Artificial enzymes convert solar energy into hydrogen gas

October 4, 2018

In a new scientific article, researchers at Uppsala University describe how, using a completely new method, they have synthesised an artificial enzyme that functions in the metabolism of living cells. These enzymes can utilize ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.