The road measures 136.07 miles long and would take a car obeying speed limits 4 hours and 46 minutes to travel its length.
The A4 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 BRISTOL, Avonmouth, Sea Mills, Brislington, Keynsham, Saltford, Corston, Newton St. Loe, BATH, Bathampton, Batheaston, Box, Box Hill, CORSHAM, Lower Rudloe, Rudloe, Chequers, CHIPPENHAM, Pewsham, Old Derry Hill, Derry Hill, Studley, CALNE, Calstone, Cherhill, Beckhampton, West Kennett, West Overton, Fyfield, Lower Fyfield, Manton, MARLBOROUGH, Froxfield, HUNGERFORD, Eddington, Lower Denford, Kintbury, Halfway, Marsh Benham, Stockcross, Speen, NEWBURY, Benham Hill, THATCHAM, Midgham, Woolhampton, Beenham, Aldermaston, Padworth, Sulhamstead, Theale, Calcot, Reading, Earley, Lower Earley, Woodley, Sonning, Charvil, Twyford, Wargrave, Hare Hatch, Kiln Green, Knowl Hill, Littlewick Green, Burchetts Green, MAIDENHEAD, Taplow, SLOUGH, Colnbrook, Harmondsworth, Longford, Hamondsworth, Heathrow, Sipson, Harlington, Cranford, Hounslow, Heston, Spring Grove, Osterley, Brentford, Chiswick, Hammersmith, Kensington, Knightsbridge, Chelsea, Belgravia, Hyde Park Corner, Mayfair, St James, Covent Garden, Embankment, Strand, Holborne, and Temple.
This is a true long-distance route that passes through multiple counties, including Bristol, Somerset, Wiltshire, Berkshire, Buckinghamshire, City and County of the City of London, and Greater London.