A. To raise the speed limits
B. To help the traffic flow
C. To provide better parking
D. To allow lorries to load more freely
Inconsiderate parking can obstruct the flow of traffic and so make traffic congestion worse. Red routes are designed to prevent this by enforcing strict parking restrictions. Driving slowly in traffic increases fuel consumption and causes a build-up of exhaust fumes.
Double red lines mean that the prohibition lasts all day.
Single red lines mean the parking restrictions extend just during the times marked on signs.
The restrictions apply to everyone except taxis picking up or dropping off, and blue badge holders.
Red routes maps are here.