Peel Regional Road 18

Peel Regional Road 18, or locally known as Mavis Road is a street in Peel Region, Ontario, Canada, running in the cities of Mississauga and Brampton. The road begins at the Queensway, as a continuation of Stavebank Road (a residential street), and runs north to Steeles Avenue, where it changes its name and continues north as Chinguacousy Road.

Unlike most major roads in Peel, and the Greater Toronto Area in general, Mavis Road was largely built in modern times. Only the southernmost portion was part of Peel's original concession road grid, and was named Stavebank Road, parts of which still bear that name (see above). The section north of Queensway was later renamed Mavis Road and was reconstructed as a major thoroughfare when the area became more developed. It was extended north of its original terminus at Eglinton Avenue to Britannia Road in 1991, and then extended north of Highway 401 (where a new interchange was constructed) in 1998 to its current terminus at Steeles Ave. To connect with Chinguacousy Rd. at Steeles, the Mavis extension had to veer westwards from its main alignment and displaced Second Line West (which was subsequently either closed or broken up into various local streets) as the road which continued Chinguacousy southwards.

The CPR level crossing north of Dundas Street, since replaced by a bridge, was the site of the infamous 1979 Mississauga train derailment.