BREAKDOWN Truck 2:11 pm – M1 Pacific Motorway Cowan just past Hawkesbury River Bridge 1 of 3 Southbound lanes closed. Lane 1. The truck is currently under tow heading southbound on the M1 Pacific Motorway travelling at around 20km/h. Exercise caution Allow extra travel time Transport for NSW, are attending . Heavy traffic conditions. Last checked at 3:38pm.