The road measures 42.26 miles long and would take a car obeying speed limits 1 hours and 29 minutes to travel its length.
The A404 is a A Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like MAIDENHEAD, Bisham, MARLOW, HIGH WYCOMBE, Hazlemere, Holmer Green, Beamond End, Mop End, Penn Street, Winchmore Hill, AMERSHAM, CHALFONT ST. GILES, Little Chalfont, Chenies, Chorleywood, Loudwater, RICKMANSWORTH, Batchworth Heath, Northwood, Pinner, Hatch End, Headstone, Harrow, North Wembley, Sudbury, Brent, Wembley, Willesden, Kensal Green, North Kensington, Kensal Town, Kilburn, Maida Hill, Maida Vale, Marylebone, and Paddington.
The road passes through several counties, including Berkshire, Buckinghamshire, Hertfordshire, and Greater London.