Delays for motorists amid fog, power outages and crashes. THICK fog, power outages and minor crashes are causing delays for motorists this morning. Nick Green from the Australian Traffic Network says a two-car crash at Parafield Gardens, at the intersection of Salisbury Highway and Ryans Rd, is causing delays. It followed another delay at Marleston after a crash at the intersection of South and Richmond roads. This has since been cleared. Mr Green also says a power outage at Dry Creek has caused traffic lights to malfunction at the Salisbury Highway and Port Wakefield Rd intersection. And fog is again thick in the Hills this morning, reducing the speed limit to 80km/h between the Heysen Tunnels and Crafers. Speed Cameras Port Rd, Beverley; Brighton Rd, Brighton; Sir Donald Bradman Dr, Brooklyn Park; Cheltenham Pde, Cheltenham; Goodwood Rd, Colonel Light Gardens; South Rd, Edwardstown; Bower Rd, Ethelton; Grange Rd, Findon; Hartley Rd, Flinders Park; Belair Rd, Hawthorn; Seaview Rd, Henley Beach; Henley Beach Rd, Lockleys; Cross Rd, Myrtle Bank; Victoria Rd, North Haven; Morphett Rd, Oaklands Park; Eastern Pde, Ottoway; Addison Rd, Pennington; Anzac Hwy, Plympton; Trimmer Pde, Seaton; Military Rd, Semaphore Park; South Rd, St. Marys; Cross Rd, Urrbrae; Diagonal Rd and Morphett Rd, Warradale. Heaslip Rd / Edinburgh Rd - Burton Holbrooks Rd / Ashley St - Underdale Holbrooks Rd / Beatty St - Flinders Park Marion Rd / Talbot Av - North Plympton Port River Expressway / Hanson Rd