You drive on logan rd past autoforce import yard, turn left @ the next intersection with the caltex petrol station on your right hand side.
this is heding toward underwood on logan rd btw
Keep driving down miles plating rd going over the m1, just b4 the set of lights turn into the car park, as r33skyliner said its across the rd from the bus depot. your can jump straight back onto the gateway to head done the coast. Not a bad spot and no cops which is nice.
hope that helps people