who goes first ?

[N3WMAN]

What happens if there is a chicken crossing the road just as they get there?

 

[rafiki911]

That would be fun to watch.

 

[psycho44]

What happens if there is a chicken crossing the road just as they get there?

that's a no brainer ... the chicken! Don't want to infuriate Pamela Andersons' posses

 

[sircastic]

What happens if there is a chicken crossing the road just as they get there?

But what if they're responding to a call for a reported seal clubbing?

 

[cycling]

But what if they're responding to a call for a reported seal clubbing?

That`s OK as long as the seal is not drinking and driving.

 

[OpenGambit]

Nah the real question is. which vehicle are the lawyers following?

 

[daught]

What happens if there is a chicken crossing the road just as they get there?

What is the chicken is on a conveyor belt?

 

[Gummiente]

What happens if there is a chicken crossing the road just as they get there?

The cops will handle it...

 

[Dresden]

Correct.
Due to the fact, that the Fire truck will be the only apparatus to change the colour of the light before they even get there.

Except in the OP's original question, he states "all arrived at an intersection at the same time,".

My best guess would be: the fire truck, followed by the ambulance, police, and lastly Newman.