The Toll Bridge apparently is not a tool bridge at all that everyone thought.

It Is a toll road for the bit of haslams lane (not even sure it it goes this far now) through the mills area. Which is a private road. 

Probably should still call the bridge the toll bridge even though it doesn't have a toll as that is what everyone calls it, everywhere.

https://www.derbytelegraph.co.uk/news/derby-news/bits-concrete-crumbling-derby-bridge-7154244