I am looking at booking a train from Edinburgh down to London. I need to travel over the bridge and the easiest way is using the bus which comes into Edinburgh from Ingliston Park and Ride and then through Corstorphine. I am just wondering how busy Corstorphine is these days for traffic in the morning? It used to be bad. I am pondering getting off the bus at Park and Ride and jumping on the tram to get to the Waverley end of Princes Street a bit quicker? I am looking at a train which leaves around 9 am from Waverley on a Friday.