All four drivers were found to have blood-alcohol readings more than twice the .05 legal limit in an outcome the head of the ACT's traffic operation, Sergeant David Wills, described on Monday as "disappointing".

Apprehended by police over the Easter holiday break were a 45-year-old Evatt man with a blood-alcohol reading of .130, a 32-year-old Thai national with a reading of .136, a Banks man who recorded .134, and a 32-year-old woman, also from Banks, who recorded .113.

"It's disappointing that these drivers have put their lives, and the lives of other road users, in danger by acting irresponsibly," Sergeant Wills said.

With double demerits in place until midnight on Monday, speeding is likely to result in a loss of licence for a 31-year-old female P-plate driver from NSW, who was clocked by police at 96km/h in an 80km/h zone on the Kings Highway.

The same driver also tested positive for driving under the influence of methaphetamine, was arrested, and was bailed to appear before the ACT Magistrates Court at a later date.

Meanwhile, police across the border in NSW were called to attend a range of offences including a very dangerous incident involving the driver of a Kenworth B- double semi-trailer which was seen swerving across two lanes of traffic on the Hume Highway, and then reversing back up the highway.

The truck later became stuck under the canopy of a BP service station near Prestons.

The truck driver, a 50-year-old man from Queensland, had to be physically restrained by bystanders and the service station staff.

By Monday morning, the NSW Easter road toll had reached three dead, two more than during the same period last year.