Modelling duration of car-bicycles overtaking manoeuvres on two-lane rural roads using naturalistic data

Area of Science:

• Road safety
• Traffic engineering
• Human factors in transportation

Background:

• Sport cyclists share Spanish two-lane rural roads with vehicles.
• Overtaking maneuvers are the most dangerous interaction due to speed differences.
• Overtaking duration is critical for safety and traffic flow.

Purpose of the Study:

• Analyze factors influencing cyclist overtaking duration on rural roads.
• Investigate road, cyclist, and maneuver characteristics.
• Develop predictive models for overtaking duration.

Main Methods:

• Collected naturalistic field data using instrumented bicycles.
• Analyzed 1592 flying and 192 accelerative overtaking maneuvers.
• Modeled overtaking duration using Bayesian statistics.

Main Results:

• Flying overtakes were more common, faster, and had less lateral clearance, resulting in shorter durations.
• Overtaking duration increased with road width and cyclist group size.
• Oncoming vehicles decreased overtaking duration, but other factors varied by strategy.

Conclusions:

• Developed predictive models for overtaking duration based on road and cyclist characteristics.
• Results inform road administration for cyclist safety countermeasures.
• Aims to integrate cyclists safely and efficiently on rural roads.