How long did it take for your 2nd/ 3rd/ 4th babies to come once labour started?

We need to decide where to have #3, the nearest BIG city is 45mins away + 20mins to park, I dont wanna get caught out LOL
DH almost didnt make it on time last baby (he had to go home to get my bag and organise his parents to look after the DS1)
There are ok hospitals here but they are crowded and not really the best.