On the road again

One of the (occasional) bonuses of misreading the map (happens often) is you come across some places you would otherwise miss.
This little bridge saved us a detour back on to the right road, and all for a toll 60p. We had to do a quick weight calculation & decided that even after all of our holiday breakfasts, lunches & dinners we could still drive across quite safely.
I do need to learn to read a map better. Of the two bridges over the River Severn near Bristol, one is free & one costs a staggering £6. Guess which one I directed us to cross?