The same Masterton intersection has claimed three crashes in three weeks, prompting a warning to Christmas motorists to keep vigilant.
An off duty police officer's Alfa Romeo was T-boned by a Golf which travelled through the stop sign on the corner of Russell and Queen Sts about 4.15pm yesterday.
Both woman drivers were unhurt in the accident.
Constable Dana Johanson said the Alfa Romeo was heading east on Russell St when the driver of the Golf "failed" to stop at the compulsory stop sign on Queen St as she headed north, slamming into the driver's side of the other car, spinning it 360 degrees.
"It was facing in the opposite direction."