Motor Vehicle InjuryNCT04956250
Traffic Safety Study at Calgary Elementary Schools
A study testing Traffic Calming Curbs and In-Street Pedestrian Sign in people with Motor Vehicle Injury, run by University of Calgary at 1 site in Canada.
Trial 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. Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Motor Vehicle Injury
- What is being tested?
- Traffic Calming Curbs and In-Street Pedestrian Sign
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 0 participants
- Where
- 1 siteCanada
- Study dates
- 1 May 2020to 1 May 2021
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- No individual participants are recruited.
Who cannot join
None listed.
Trial locations and contacts
1 site in 1 country.
About this study
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.
Read the 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.
- Conditions
- Motor Vehicle Injury
- Being tested
- Traffic Calming Curbs, In-Street Pedestrian Sign
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Traffic Calming CurbsOther
Temporary curb extensions, placed at intersections.
In-Street Pedestrian SignOther
Yield sign placed in middle of road at intersection.
| Study group | Role | What they receive |
|---|---|---|
| Traffic Calming Curb Group | Experimental | Traffic calming curbs are yellow concrete slabs designed by the City of Calgary to be the same height as other roadside curbs and improve safety by reducing the street width, similar to curb extensions. Receives: Other: Traffic Calming Curbs |
| In-Street Sign Group | Experimental | In-street pedestrian signs are regulatory signs placed along the centre line of the street, to remind road users of a pedestrian right-of-way at the marked/unmarked crosswalk. Receives: Other: In-Street Pedestrian Sign |
What is being measured
The primary outcome is the main question the study is designed to answer.
Traffic Speed - Pre-intervention
Traffic speed of all vehicles who pass by the intervention will be recorded.
Measured: At each location, a week of pre-intervention data collection will occur a week prior to the intervention being installed.
Traffic Speed - Post-intervention
Traffic speed of all vehicles who pass by the intervention will be recorded.
Measured: At each location, a week of post-intervention data collection will occur a week after the intervention being installed.
Traffic Speed - Follow-up
Traffic speed of all vehicles who pass by the intervention will be recorded.
Measured: 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 (6)
Traffic Volume - Pre-intervention
The number of all vehicles who pass by the intervention will be recorded.
Measured: At each location, a week of pre-intervention data collection will occur a week prior to the intervention being installed.
Traffic Volume - Post-intervention
The number of all vehicles who pass by the intervention will be recorded.
Measured: At each location, a week of post-intervention data collection will occur a week after the intervention being installed.
Traffic Volume - Follow-up
The number of all vehicles who pass by the intervention will be recorded.
Measured: 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.
Active Transportation Counts - Pre-intervention
The number of people (Adults v Children) who use the intervention location, and mode of travel (e.g. walking, bicycling).
Measured: At each location, a day of pre-intervention data collection will occur a week prior to the intervention being installed. .
Active Transportation Counts - Post-intervention
The number of people (Adults v Children) who use the intervention location, and mode of travel (e.g. walking, bicycling).
Measured: At each location, a day of post-intervention data collection will occur a week after the intervention being installed. .
Active Transportation Counts - Follow-up
The number of people (Adults v Children) who use the intervention location, and mode of travel (e.g. walking, bicycling).
Measured: 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.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Jul 2021
- Study start1 May 2020
- Primary completion31 Oct 2020
- Study completion1 May 2021
Why it stopped: No participants were intended to be directly recruited.
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Motor Vehicle InjuryStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Sequential
- Model description
- Modified Stepped-Wedge Randomized Controlled Trial
- Masking
- None (open label)
- Enrolment
- 0 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Calgary
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04956250
- Sponsor's protocol ID
- REB19-1455
- Status last verified
- Mar 2021
- First submitted
- 7 Apr 2021
- Last updated
- 26 Jun 2023
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 26 Jun 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Traffic Safety Study at Calgary Elementary Schools
- ClinicalTrials.gov ID
- NCT04956250
- Acronym / sponsor ID
- REB19-1455
- Conditions
- Motor Vehicle Injury
- Study type
- Interventional
- Recruitment status
- WithdrawnReason stopped: No participants were intended to be directly recruited.
- Enrolment
- 0 participants (actual)
- Lead sponsor
- University of CalgaryUniversity, hospital or other
- Study start
- 1 May 2020 (actual)
- Primary completion
- 31 Oct 2020 (actual)
- Study completion
- 1 May 2021 (actual)
- First posted
- 9 Jul 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- Modified Stepped-Wedge Randomized Controlled Trial
| Arm | Type | Receives |
|---|---|---|
| Traffic Calming Curb Group | Experimental | Other: Traffic Calming CurbsTraffic calming curbs are yellow concrete slabs designed by the City of Calgary to be the same height as other roadside curbs and improve safety by reducing the street width, similar to curb extensions. |
| In-Street Sign Group | Experimental | Other: In-Street Pedestrian SignIn-street pedestrian signs are regulatory signs placed along the centre line of the street, to remind road users of a pedestrian right-of-way at the marked/unmarked crosswalk. |
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (1 listed)
- No individual participants are recruited.
Key exclusion criteria (0 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Traffic Calming CurbsTemporary curb extensions, placed at intersections. | Other | Traffic Calming Curb Group |
| In-Street Pedestrian SignYield sign placed in middle of road at intersection. | Other | In-Street Sign Group |
Primary outcome
Traffic Speed - Pre-intervention
Time frame: At each location, a week of pre-intervention data collection will occur a week prior to the intervention being installed.
Traffic speed of all vehicles who pass by the intervention will be recorded.
Traffic Speed - Post-intervention
Time frame: At each location, a week of post-intervention data collection will occur a week after the intervention being installed.
Traffic speed of all vehicles who pass by the intervention will be recorded.
Traffic Speed - Follow-up
Time frame: 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.
Traffic speed of all vehicles who pass by the intervention will be recorded.
6 secondary outcomes
Traffic Volume - Pre-intervention
Time frame: At each location, a week of pre-intervention data collection will occur a week prior to the intervention being installed.
Traffic Volume - Post-intervention
Time frame: At each location, a week of post-intervention data collection will occur a week after the intervention being installed.
Traffic Volume - Follow-up
Time frame: 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.
Active Transportation Counts - Pre-intervention
Time frame: At each location, a day of pre-intervention data collection will occur a week prior to the intervention being installed. .
Active Transportation Counts - Post-intervention
Time frame: At each location, a day of post-intervention data collection will occur a week after the intervention being installed. .
Active Transportation Counts - Follow-up
Time frame: 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.
Results and safety
The study was withdrawn before enrolling participants, so there are no results.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 Jun 2023.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Traffic Calming Curbs and In-Street Pedestrian Sign in people with Motor Vehicle Injury, run by University of Calgary at 1 site in Canada.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 0 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: withdrawn, as of the sponsor's last update on 26 Jun 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Canada. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study was withdrawn before enrolling participants, so there are no results.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Traffic Speed - Pre-intervention (time frame: At each location, a week of pre-intervention data collection will occur a week prior to the intervention being installed.). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Jun 2023.