Councils are making millions of pounds from fines issued to drivers stuck in yellow box junctions during poor traffic flow.
A junction in Fulham, south-west London, has raised £2.4 million from Penalty Charge Notice fines in the past 18 months, the BBC reports.
Councils have cameras looking at many of these junctions to help them enforce traffic regulations, which state that drivers must not enter a box junction until the exit is clear.
However, the Institute of Highways Engineers (IHE) said that in areas where the number of people being charged is high, there are likely wider traffic issues to look at.
Shocking footage captured by BBC reporters during its investigation shows a driver being verbally abused for holding up traffic, before the cameraman is then physically attacked by another motorist.
The confrontation was caused because the driver being filmed couldn't enter the box junction as the exit wasn't clear.
In the clip, recorded for BBC Inside Out, the abused driver is forced to drive a different way through fear of being attacked again or receiving a ticket for blocking the road.
Hammersmith and Fulham Council, which oversees the box, said: "This is one of the busiest routes into London. Seven million drivers navigate the junction each year without breaking the rules and getting a ticket."
Richard Hayes from the IHE said: "Something is definitely wrong. The situation isn't the box junction - it's the traffic flow ahead of the box junction that is causing the problem."
Inside Out will be broadcast tonight at 7.30 on BBC One London.