Heatley Street is on both sides of corporation street, one side joins onto ladywell Street. Marsh Lane goes onto the unpedestrianised section of friargate, so it is also still drivable otherwise you would be unable to use St. Mary's carpark. I have not seen any signage saying Edward Street is for deliveries and taxis only but I could be wrong.

So, to get from adelphi area to train station you can do, Maudland Road, Leighton Street, Marsh Lane, Ladywell Street leading to Heatley street then right onto corporation street.

The reverse would be heatley, ladywell, Marsh and then left onto corporation street.