The A1 (Barnet Bypass) and A41 (Watford Bypass) converge at Apex Corner roundabout.
Apex Corner was the site of the Apex Garage, built beside the roundabout - itself part of a 1920–4 road improvement programme. Although it is still officially named Northway Circus
, the garage, now gone, gave its name to the area.
A landmark pub, The Royal Scot
, stood at the junction - this turned into a Kentucky Fried Chicken and then later a hotel. Still later, a McDonalds arrived there.
The 100 square metres that covers the A1 and A41 junction and nearby in Selvage Lane
, the M1 running under a bridge, was for a while in the 1990s the UK’s busiest square kilometer, measured by traffic flow.