On May 9, 2024, our team did a traffic study at the intersection of Stittsville Main and Brae Street. We wanted to see how long it took for vehicles to turn out of Brae Street onto Stittsville Main during the morning rush hour.

(In September 2023, City staff evaluated the intersection to see if would qualify for a traffic signal, but it did not meet the minimum requirement to install traffic lights. You can see details here.)

Here’s a summary of the data that we collected on May 9. We tracked how long each vehicle waited to turn right or left onto Stittsville Main Street, including time in line and time at the stop sign.

What we found:

  • 177 vehicles turned off of Brae Street between 7:00 a.m. – 9:00 a.m., and 82% were turning north (left turn).
  • Drivers spent nearly twice as long waiting to turn north (left turn) than south (right turn). Average wait time for vehicles heading north was 29.7 seconds, and heading south was 16.5 seconds.
  • Volume (number of vehicles) was relatively steady from 7:30 a.m. onwards. We counted the highest number of vehicles between 8:45 a.m. – 8:59 a.m. with 28 vehicles.
  • We measured average wait times in 15-minute increments. Average wait times were below 30 seconds in each time period except for the 15 minutes between 8:15 a.m. – 8:29 a.m. when the average wait time was 71 seconds.
  • The wait time is under 30 seconds for most drivers during the study period, except for the very high peak from 8:15 a.m. – 8:29 a.m. when traffic was busier on Stittsville Main.

We’ll share this with City staff and continue to look for a solution to make this intersection safer and more convenient for all users.

Click here to download the data in a CSV file.


Data summary

Vehicle Count Average wait time Median wait time
Shortest wait time
Longest wait time
All Vehicles 177 27.3 15 1 196
Turning North 145 29.7 16 1 196
Turning South 32 16.5 7 2 105

Wait times are calculated in seconds. For example, 196 seconds = 3 minutes and 16 seconds. 105 seconds = 1 minute and 45 seconds.


Graphing the data

Wait time in seconds, north and south

Wait time in seconds, north only

Wait time in seconds, south only


Average wait times and volume by time increment

We divided the data up into 15-minute segments to get a better picture of “peak times” for traffic. The first graph shows average volume (number of vehicles) for each 15 minute segment between 7:00 a.m. – 9:00 a.m., and the second graph shows the average waiting time in each increment. Vehicle counts are are highest after 8:00 a.m., and there was a period of 15 minutes between 8:15 a.m. – 8:29 a.m. with a much higher average wait time.

Vehicle Count by increment

Average Wait time in Seconds by increment

 

Team Stittsville counts traffic on Stittsville Main, May 2024

Counting and timing traffic on Brae Street, May 2024