NCT03798990

Reduce Speed Limits From 90km/h to 80 km/h on French Roads: Impact on Mortality

Reduce Speed Limits From 90km/h to 80 km/h on French Two-way Roads Without Central Separator: the Number of Traffic Related Fatalities on the Network Concerned "Before and After" the Reduction of Speed Limits.

• Status: Unknown
• Phase: —
• Study type: Observational
• Enrollment: 80,000,000 (estimated)
• Sponsor: Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement · Academic / Other
• Sex: All
• Age: —
• Healthy volunteers: Accepted

Summary

On the first July 2018, the French government lowered the maximum authorized speeds on two-way roads without a central separator from 90 km/h to 80 km/h. The network concerned represents approximately 400 000 km of roads outside the built-up area, accounting for 55% of road deaths. The objective of the measure is to reduce the number of deaths on the roads concerned by encouraging the reduction of the average speed practiced by drivers. The analysis deals with a comparison of the number of killed persons on the network concerned, before and after the reduction of the speed limits. The "before" period is 2015-2017. The "after" period is from July 2018 to June 2019. The data used are extracted from the national bodily injury accident file (BAAC). The police fills this file for each road accidents occurring on a road open to public traffic and causing at least one victim (i.e., one user requiring medical care and involving at least one vehicle).

Detailed description

This measure was intended general and concerns a type of roads in its entirety. The rest of the road network is too heterogeneous (urban, highways ...), leading to an accidentology very far in terms of severity, users concerned and families of accidents to allow the establishment of control groups that would not be affected by a reduction in the speed limit. As a result, the principle of an assessment of "before-and-after" effects has been retained.

Conditions

• Health Risks
• Death

Timeline

• Start date: 2015-01-01
• Primary completion: 2019-07-01
• Completion: 2020-01-01
• First posted: 2019-01-10
• Last updated: 2019-01-10

Locations

1 site across 1 country: France