CRASH [SITE NOW CLEARED] B-Double into roadwork vehicles, man critically injured 3:53 am – M1 Pacific Motorway Alison near Alison Road overpass. Southbound Motorway was closed earlier but CONTRAFLOW conditions are now causing major delays in both directions. Alternate Diversions: Sparks Rd, Pacific Hwy, then Wyong Rd to rejoin the M1. This diversion is suitable for all vehicles. Two road workers have been injured after a semi-trailer crashed into two stationary work vehicles and impacted the workmen. Both men suffered serious injuries and have been taken to hospital for further treatment. One man’s condition is considered serious. The semi-trailer caught alight; the driver was able to free himself and escaped injury. He will be taken to hospital for mandatory tests. Use diversions Allow extra travel time; Exercise caution. Transport for NSW, Rural Fire Service, Heavy vehicle tow truck and Emergency services are attending. Heavy traffic conditions. Delay Travel. All Backroads Congested.