Perri Gameâ€™s Volkswagen Polo
Perri Gameâ€™s Volkswagen Polo was written off in the crash
Police in an unmarked black BMW X5 rammed into Perri Game, 21, from Chalgrove, Oxfordshire, to â€œprevent a serious traffic collisionâ€.
Game and two officers were taken to hospital with minor injuries on 29 January after the crash.
She admitted dangerous driving and drink driving at Guildford Crown Court.
Game was also disqualified from driving for three years and ordered to pay a total of Â£630 costs.
Surrey Police said PC Simon Down and PC Ed Stock were on routine patrol when they were advised of a crash on the A3.
â€˜Prevented a catastropheâ€™
They began a rolling roadblock on the southbound carriageway to slow traffic.
It was then the officers saw Gameâ€™s Volkswagen Polo driving towards them at 60mph.
PC Down decided to deliberately manoeuvre to bring Gameâ€™s car to a halt. As a result of the impact, both vehicles were severely damaged and written off.
Acting Ch Insp Richard Mallett, head of roads policing unit, said: â€œThe video clearly shows the risks that our officers face in the course of carrying out their duties and demonstrates the bravery shown by Simon and Ed that morning.
â€œTheir decisive action almost certainly prevented a catastrophe happening and stopped any other motorist being seriously injured or even killed.â€
From the BBC