Double-fatal Perth crash causes gridlock TRAFFIC in Perth's southeast is at a standstill and will remain so for several hours after a double-fatal car crash. Two young men died in the accident just after 6am (WST) at the intersection of Roe Highway and Karel Avenue in suburban Jandakot. Police are trying to identify the victims. Their cars were travelling in opposite directions when one crossed to the wrong side of the highway, hitting the other head-on, polie said. One vehicle burst into flames while the other wound up on its roof. North-bound lanes of Roe Highway are expected to be closed for several hours while off-ramps from Roe Highway to the Kwinana Freeway have also been closed. Cars that queued behind the crash have been turned around, causing heavy congestion on Leach Highway and the Kwinana Freeway, and other arterial roads around the crash site.