In particular, the stretch from Mavis Road to Erin Mills Parkway has been the site of numerous accidents. In this section, Highway 403 features a downward slope as motorists head eastbound towards the Mavis Road interchange; drivers complain of having to slam on the brakes when traffic comes to a standstill, leading to rear-end collisions. There is also glare from the sun that causes vision problems throughout the day. In addition, unusual for an urban freeway, this section of Highway 403 had no lighting until the mid-2000s.