Mind the gap: training road users to use speed and distance when making gap-acceptance decisions

Area of Science:

• Psychology
• Human Factors
• Traffic Safety

Background:

• Accurate gap-acceptance decisions are crucial for road safety.
• These decisions rely on assessing both vehicle distance and speed.
• Current methods for teaching these skills are limited.

Purpose of the Study:

• To develop and test an intervention to improve road users' gap-acceptance decisions.
• To enhance the ability to consider both vehicle speed and distance simultaneously.
• To evaluate the intervention's effectiveness across different age groups.

Main Methods:

• Three studies were conducted involving participants judging the safety of crossing a road with oncoming vehicles.
• Interventions included standard feedback, a three-look technique, and a two-response method (judging vehicle speed as typical or atypical).
• Effectiveness was assessed using verbal and behavioral measures, with Study 3 using video footage for younger and older adults.

Main Results:

• Standard feedback improved accuracy in Study 1.
• The two-response intervention proved more effective than standard feedback in Study 2.
• The two-response intervention successfully improved gap-acceptance accuracy in both younger and older adults in Study 3.
• Older adults showed more conservative judgments after the intervention, regardless of accuracy improvements.

Conclusions:

• The two-response intervention is a promising method for enhancing gap-acceptance accuracy in road users.
• This intervention can be effectively applied to both younger and older adult populations.
• Further research may be needed to address age-related differences in judgment conservatism.