
01Section
The northern approach
Along the airport's northern edge runs the A4 Bath Road, passing Harlington and Longford. The Northern Perimeter Road, meanwhile, gives access to the cargo area, the maintenance bases and the facilities used by business aviation.
The usual way in from London is the M4 as far as junction 4, then the A4 heading west. Approaching from the west instead, you leave the M25 at junction 14 or 15 and join that same road travelling the other way.
At no stage does the route go near the terminal road network, and that's deliberate. For a private movement at Heathrow, the tunnels, the loops round the terminals and the drop-off rules for scheduled passengers simply don't apply.









