The A400 road is an A road in London that runs from Charing Cross (near Trafalgar Square, in London's West End) to Archway in North London. It passes some of London's most famous landmarks.
The Northern line (Charing Cross and High Barnet branches) runs beneath the A400 between Charing Cross and Archway stations. Between Charing Cross and Euston Road (Inner Ring Road), the road is in the London Congestion Charge zone.
