And here's the rest of the screenshots I nabbed:

Police car. 2 stars.

Ambulance (all we see is the back of it). 2 stars.

Red Saab. 1 star.

Red car of some sort. 1 star.

Mercedes. 1 star.

Mercedes truck. 1 star.

Car. 1 star.

Another ambulance. Despite being so far in the background, it catches one character's attention and reminds him of the earlier ambulance, so I think it ought to be included. 1 star.

Car to the van's left (our right). 1 star.

Blue car. 1 star.

Take your pick, heh. 1 star.

Jeep Cherokee. 1 star.

Volvo. 1 star.

Either of these two cars. 1 star.

Car. 1 star.

Bus. 1 star.

Van to the right. 1 star.

And finally another police car. Leave out if same make and model as the first one. 1 star otherwise.