The Church Street car park is a legitimate through route.

I remember 50 years ago, before I was old enough to drive, my Mother would use it when travelling from the Waitrose car park in Junction Road to exit Dorking to the NW along Ranmore Road.

Now living in Dorking myself, I very rarely drive through the town from one side to the other, and I haven't encountered Waze using the Church Street route as an alternative to staying on the A25 - but I can see why it would, almost anything is quicker than Vincent Lane at peak times.

My choice of east-west route would be via Ashcombe Road to the north of the town, and that was the first choice Waze came up with when I asked it for a route just now. Interestingly staying completely on the A25 wasn't in it's top 3!

You are right to query the use of a ramp segment. I think this is a hangover from the days when we had less control over the text of turn directions. I would have wanted Waze to say "towards car park" without that text appearing as a street name on the map. A ramp used to be the only way of getting Waze to say something other than a street name. Now that we have more control, I've changed it to a street. 

This will make no difference to the routing which was the main point of your query. The philosophy of Waze is to find the quickest legal route, and this is what it is trying to do here. I'm not aware that the council has any official position on routes, but it's always open to them to make "access only" orders if they want to block a route. In the meantime, the Waze algorithms will do their best - but Waze only advises, the driver retains control of the steering wheel.

Ian
 
 

Having thought about it a bit more, I've created a junction box to prevent left turns out of Church Road if you start from Junction Road south of Waitrose. I would have started the junction box in South Street, but this made it too big.
This has no effect at all on people leaving Waitrose, but stops the Waze routing between A25 South Street and A25 Westcott Road via the car park.

This looks a bit odd, but as I do not know the history I have passed it back to the editor who did this. He should be along soon to explain. 
 

Hi Ian,
Thanks for answering this, I agree that usually it takes you north via Ashcombe Road, but semi often it it will take you this route, and if you are already in town it often takes you this route too.

Thanks for answering though, and I understand in regards to why it was a ramp before!

Cheers

Not sure how I missed this, but thanks, I think that makes sense to me too.
Cheers.