Residents have been reaching out to my office with concerns regarding the intersection at Carp and Hazeldean. My office has been looking into concerns pertaining to this particular intersection with traffic staff for quite some time.
Upon forwarding resident requests for an advance green left-turn-light, staff response in the past has always been that vehicular traffic is not high enough to justify such a feature. More background on this particular study can be found on my website here.
While I can appreciate the desire for additional safety concerns at this intersection, I have requested that Traffic staff supply my office with traffic data / collision reports so that I may share it with residents.
A summarized breakdown of the collision data from 2011-2015 is available in PDF form here.
In 2015, this intersection ranked 167th of 955 signalized intersections in the City (tied with 19 other intersections) with a total of 10 collisions, comparative with 2014 data wherein the intersection ranked 50th (tied with 11 other intersections) with a total of 18 collisions. Of note, Hunt Club and Riverside had the highest number of collisions in 2015 with a total of 60. 2016 numbers are not available for review until finalized later this fall.
The City’s Safety Improvement Program (SIP) identifies high collision locations, based upon police collision reports and traffic volumes. Engineering studies have found that locations that have a statistically over-represented collision trend, may benefit from engineering countermeasures. For example, if there are more left-turn collisions at a location, than other similar intersections, and these are found to be statistically over-represented, then it may be worthwhile to install a protected/dedicated left-turn phase.
If a collision trend is not over-represented, compared to other similar locations, then it is possible that a side effect of the intervention may create other problems that could result in a general decline in the safety of the location.
The SIP program recognizes that there are many locations across the City, that have over-represented collision trends, and uses it’s funding to address these locations as a priority. The SIP program is mandated to determine locations where the investment is likely to reduce the most collisions.
I hope that these statistics help to shed additional light on the intersection for many residents. Of course, should you have any questions, please do not hesitate to email me at Shad.Qadri@ottawa.ca.
For a full list of annual road safety reports, please visit http://ottawa.ca/en/residents/transportation-and-parking/road-safety/annual-safety-reports