Hi Kevin
There are indeed 2 road Bridges that cross the Forth, north of Edinburgh. The original Forth Road Bridge is now for the exclusive use of buses and taxis since the opening of the Queensferry crossing. The M90 was constructed in tandem with the Forth Road Bridge as its feeder motorway in the 1960's but has been much extended over the decades and modified more recently to align with the Queensferry Crossing. I'm sorry to hear that you are not taking up your option on the RZ and thank you for considering me as your "reserve" on the waiting list but I am perfectly happy with the NX450h+. Enjoy your BMW when it comes. Your LC500 is stunning - I saw it at Lexus Edinburgh pre delivery to yourself!