At 2.10pm on Saturday, police stopped a vehicle on Cowcumbla Street in Cootamundra, for the purpose of a random breath test.

The 23-year-old male driver was subject to a random breath test which returned a positive result.

MAP: The street where police conducted the RBT

The motorist was then arrested and taken to Cootamundra Police Station where he was subject to a breath analysis which returned a negative result.

Upon searching the man, police located substances believed to be methylamphetamine, and resealable bags.

He was charged with supply and possess prohibited drug - indictable quantity, and granted conditional bail to appear at Cootamundra Local Court next month.

Meanwhile, the region's police officers have made a plea following a high number of fatalities on Western NSW roads so far this year.

Western Region Traffic Tactician Inspector Ben Macfarlane said a number of single-vehicle and off-road accidents had featured among the region's fatalities.

"They could be fatigue or driver distraction, it's a concern," he said.

"We're still getting that percentage who weren't wearing their seatbelts when they crashed."

Two separate stints of double demerit points apply for motorists, these run from April 18-22, and then April 24-28. The period applies from midnight on the start date to midnight on the finish date.

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