根据CAA（Canadian Automobile Association）星期三最新发布报告，报告中将交通中最堵的路段称为瓶颈路段（bottlenecks），加拿大最糟糕的瓶颈路段可以跟美国最主要的大城市纽约和洛杉矶相比了。
报告分析加拿大各省市总共3,000公里的GPS资料。全加拿大最堵的20个路段中，多伦多占了整整一半；其中央街与427高速之间的401、Don Mills Road与Finch Avenue之间的DVP/404高居这个榜单的第一和第二位。
加拿大瓶颈路段第二多的城市是蒙特利尔，有三个路段列入最堵路段前十名，另外有两个列入最堵路段前二十名。
排在蒙特利尔之后的城市是温哥华，也有两个路段列入前十，两个列入最堵路段前二十。
温哥华，榜上有名的是位列第九的Granville St.夹SW Marine Dr.；排在第十位的Seymour St.与W. Pender St.之间的W. Georgia St.；以及位列第十五的W. Broadway与W. 16th Ave.之间的Granville St.。
还有，排在第20位是列治文的George Massey Tunnel。
加拿大最堵的20个路段
1. Toronto, Highway 401 between Highway 427 and Yonge Street
2. Toronto, Don Valley Parkway/Highway 404 between Don Mills Road and Finch Avenue
3. Montreal, Highway 40 between Boulevard Pie-IX and Highway 520
4. Toronto, Gardiner Expressway between South Kingsway and Bay Street
5. Montreal, Highway 15 between Highway 40 and Chemin de la Cote-Saint-Luc
6. Toronto, Highway 401 between Bayview Avenue and Don Mills Road
7. Toronto, Highway 409 between Highway 401 and Kipling Avenue
8. Montreal, Highway 25 between Avenue Souligny and Rue Beaubien
9. Vancouver, Granville Street at SW Marine Drive
10. Vancouver, W Georgia Street between Seymour Street and W Pender Street
11. Toronto, Highway 401 between Don Valley Parkway and Victoria Park Avenue
12. Toronto, Black Creek Drive between Weston Road and Trethewey Drive
13. Toronto, Highway 401 between Mavis Road and McLaughlin Road
14. Montreal, Highway 40 between Highway 520 and Boulevard Cavendish
15. Vancouver, Granville Street between W Broadway Street and W 16th Avenue
16. Montreal, Highway 20 near 1re Avenue
17. Quebec City, Highway 73 between Chemin des Quatre Bourgeois and exit to Avenue Dalquier
18. Toronto, Highway 401 interchange at Highway 427
19. Toronto, Highway 400 at Highway 401
20. Vancouver, George Massey Tunnel on Highway 99
