Commuter chaos looms as large sinkhole opens in Perthâs north Weâre sorry, this service is currently unavailable. Please try again later. Dismiss Save Normal text size Advertisement A burst water main has caused a large sinkhole on one of Perthâs main roads in the cityâs north on Tuesday morning. The large sinkhole opened up on Wanneroo Road in Perthâs north. Credit:Simon Etheridge, 6PR The hole opened up on Wanneroo Road on the corner of Lancaster Road in Wangara and the road has been closed in both directions. Drivers are being told to avoid the area as morning commuter traffic is starting to swell.