Clinical trial NCT04956250: Traffic Safety Study at Calgary Elementary Schools
Official title: Traffic Safety Study at Calgary Elementary Schools
Study type: INTERVENTIONAL
Overall status: WITHDRAWN
Phase: NA
Conditions: Motor Vehicle Injury
Lead sponsor: University of Calgary
Sponsor class: OTHER
First posted: 2021-07-09
Enrollment: 0
Sex: ALL
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: SEQUENTIAL
Intervention model description: Modified Stepped-Wedge Randomized Controlled Trial
Primary purpose: PREVENTION

Brief summary: Installing specific traffic calming features designed to reduce vehicle speed and volume around schools may lead to a reduction in injury risk for child pedestrians and bicyclists, and may increase numbers of children walking and bicycling to school. Therefore, this study seeks to evaluate the effectiveness of specific built environment features at influencing traffic speed and volume, and active transportation, both immediately following installation and months later.

Detailed description: Background Collisions with motor-vehicles are a leading cause of severe child bicyclist and pedestrian injuries in Canada. Injury rates and severity are associated with traffic speeds and volume but may be moderated through traffic calming.

Objective To assess the association of specific traffic calming measures on changes in traffic speed and volume, and active transportation prevalence, around Calgary, Alberta, Canada elementary schools.

Design This modified stepped-wedge randomized controlled trial was conducted at a sample of public elementary schools, from July 2020 to May 2021. Schools had either traffic calming curbs or in-street signs installed at an intersection within 100 m of the main entrance. The primary outcome was speed of vehicles driving towards or away from intervention. Secondary outcomes were traffic volume driving past the intervention and counts of children using active transportation at the intervention crosswalk.

Eligibility criteria: Inclusion Criteria:

* No individual participants are recruited.

Primary outcomes:
measure: Traffic Speed - Pre-intervention
timeFrame: At each location, a week of pre-intervention data collection will occur a week prior to the intervention being installed.
measure: Traffic Speed - Post-intervention
timeFrame: At each location, a week of post-intervention data collection will occur a week after the intervention being installed.
measure: Traffic Speed - Follow-up
timeFrame: At a random selection of locations (drawn from those that received the intervention during the school year), a week of data collection will occur during the spring following the installation of the intervention.
Secondary outcomes:
measure: Traffic Volume - Pre-intervention
timeFrame: At each location, a week of pre-intervention data collection will occur a week prior to the intervention being installed.
measure: Traffic Volume - Post-intervention
timeFrame: At each location, a week of post-intervention data collection will occur a week after the intervention being installed.
measure: Traffic Volume - Follow-up
timeFrame: At a random selection of locations (drawn from those that received the intervention during the school year), a week of data collection will occur during the spring following the installation of the intervention.
measure: Active Transportation Counts - Pre-intervention
timeFrame: At each location, a day of pre-intervention data collection will occur a week prior to the intervention being installed. .
measure: Active Transportation Counts - Post-intervention
timeFrame: At each location, a day of post-intervention data collection will occur a week after the intervention being installed. .
measure: Active Transportation Counts - Follow-up
timeFrame: At a random selection of locations (drawn from those that received the intervention during the school year), a day of data collection will occur during the spring following the installation of the intervention.
Other outcomes:
Locations:
city: Calgary
country: Canada
facility: University of Calgary
state: Alberta
Study officials:
References: