HIGHWAY patrol officers in Sydney who are supposed to be keeping a lid on road fatalities this long weekend will spend some of their time chasing bikies instead.

The recent outlaw motorcycle club violence has stretched police resources and resulted in dozens of highway patrol officers in Sydney working for four different police operations - including two bikie strike forces.

Highway Patrol officers are unhappy about having to look out for bikie crime and monitor tensions in south-western Sydney after the Abdul Darwiche shooting, as well as trying to keep the Easter weekend road toll down.

Two bikie strike forces, Ranmore and Raptor, have had their numbers bolstered by highway patrol officers, but in many cases the same officers are working on both strike forces and other operations.

Adding to their frustration, the officers are also expected to work on the long weekend road safety blitz, Operation Tortoise, and the anti-car hoon unit, Operation Taipan.

The NSW Police Force said it was not an unusual or inappropriate use of resources.

"This is no different to any other large organisation that allocates its staff on a daily basis according to its priorities," a spokesman said.

"Suggesting that police officers cannot work on multiple strike forces or multiple investigations is akin to suggesting an accountant cannot work for multiple clients or a doctor cannot treat multiple patients."

Last night there had already been three deaths on NSW roads this long weekend - a teenager in Revesby and two pedestrian deaths, at The Junction near Newcastle and in Randwick.

Some officers lament that police bosses are quick to provide highly visible officers to address eruptions of crime but continued to understaff intelligence and surveillance support units.

In an anonymous email to the Herald, a correspondent, claiming to be an officer, said police response to bikie violence - while well-resourced with uniformed police for Raptor - did not have adequate intelligence and surveillance.