As a transport manager I would shoot a driver of ours if they went to the M74 from Edinburgh, A1 every time. If you were at say, Bathgate where we have vehicles based, I would suggest in a car, A68 onto the A1. Good drive but from memory a few speed cameras. If you are towing a caravan [gun] I would do the extra 30 miles and take the M74 for ease of driving.