Anything like signaling to turn while in a carriage or signals to cross the street. Was there any way to tell when the carriage in front of you is slowing or stopping? Any traffic laws that i've never heard of?
hi! hopefully someone can answer re London specifically, but meanwhile you can get started on this section of the FAQ*
*see the link on the sidebar or the wiki tab
I answered a question similar to this one in: Did horse-drawn carriages have turn signals? If so how did they work?.
In short, there basically was no laws of the road in the 18th and 19th century, other than travelling in the right direction with the flow of traffic. You might have the odd person using hand signals, but it was rare. Rules of the road didn't really come into effect until the automobile grew in popularity (see the Locomotive Act of 1861). You can see this in motion in the films Old London Street Scene from 1903 and A Trip Down Market Street from 1906 San Francisco. In those films you can see people darting in and out of traffic, basically running across the street when they saw an opportunity, and carriages/cars almost crashing into one another frequently. It was utter mayhem!
Hope this helps!