A teenager has been killed after the car she was in rolled over in the central west, the first fatality on the state’s roads for the Queen’s birthday long weekend.

The girl and four friends, all from Wollongong, were travelling through the Lowes Mount State Forest near Oberon when their four-wheel-drive left the trail and rolled on Saturday morning.

The girl, 15, was thrown from the car and died at the scene.

A man, 20, was flown to Orange Hospital with serious head and abdominal injuries while the male driver, 24, was taken to Oberon Hospital with minor injuries. Two other passengers in their 20s suffered minor injuries.

Acting assistant commissioner Stuart Smith urged drivers to slow down over the long weekend.

‘‘One fatality on our roads is always one too many,’’ he said.

Double demerit point penalties are in force for speeding, seatbelt and motorcycle helmet offences until Monday night.

Several drivers have been charged this weekend including a 14-year-old boy who was detected allegedly driving 100km/h in a 50km/h zone in Woodburn, in the state’s north. The boy allegedly led police on a pursuit before the van he was driving left the roadway, hit a fence and rolled.

Police said there had been 148 major crashes on the state’s roads including one on the Mount Victoria Pass where a man, 68, attempted to overtake two semi-trailers before colliding with the two trucks and a third vehicle. He was flown to Westmead Hospital with head, facial and abdominal injuries.

On day one of their blitz, officers breath-tested 43,715 drivers, issued 899 speeding fines and charged 12 people with drink driving.

Six people were killed on the state’s roads during the 2013 Queen’s birthday long weekend, up from two the previous year.