A412
A412 near Croxley Met station
Location
Country	United Kingdom
Constituent country	England
Road network
Roads in the United Kingdom Motorways A and B road zones

The A412 is a road in England between Slough and Watford. It was the main artery for this corridor and used to continue to St Albans prior to the construction of the M25. It provides interchange to the A4 in Slough, the A40/M40 at the Denham Roundabout, the M25 in Maple Cross, the A404 in Rickmansworth town centre, the A411 on a partially grade separated dual carriageway in Watford town centre, and the A41 in North Watford.

Berkshire

• Slough

Buckinghamshire

• Iver Heath
• Denham

Hertfordshire

• Maple Cross
• Rickmansworth
• Croxley Green
• Watford
• North Watford
• Garston

v t e A roads in Zone 4 of the Great Britain road numbering scheme
	A4 A40 A41 A42 A43 A44 A45 A46 A47 A48 A49
	A400 A403 A404 A405 A406 A412 A413 A414 A415 A417 A418 A419 A420 A421 A422 A423 A426 A427 A428 A429 A431 A432 A433 A441 A442 A444 A445 A446 A448 A449 A452 A453 A454 A456 A458 A461 A465 A466 A468 A469 A470 A473 A474 A475 A476 A477 A478 A479 A482 A483 A485 A486 A487 A489 A490 A491 A493 A494 A496 A498 A499
	A4005 A4006 A4008 A4010 A4018 A4032 A4042 A4050 A4053 A4054 A4055 A4059 A4060 A4061 A4063 A4069 A4074 A4076 A4080 A4085 A4086 A4103 A4107 A4109 A4110 A4113 A4117 A4118 A4119 A4123 A4130 A4133 A4135 A4136 A4138 A4142 A4144 A4146 A4148 A4150 A4155 A4160 A4161 A4174 A4200 A4202 A4204 A4214 A4216 A4221 A4226 A4230 A4232 A4234 A4240 A4241 A4260 A4361 A4400 A4536 A4540
List of A roads in Zone 4 List of B roads in Zone 4

v t e Transport in Buckinghamshire
Road	Motorways M1 M4 M25 M40 A-roads A4 A40 A41 A404 A412 A413 A418 A421 A422 A428 A4010 A4012 A4146 A4155 A5 A508 A509 A5130 Roman roads Akeman Street Watling Street Notable junctions Handy Cross roundabout Denham Roundabout Magic Roundabout (High Wycombe) Motorway service stations Beaconsfield Newport Pagnell
Rail	Main lines West Coast Main Line Chiltern Main Line Great Western Main Line Other lines Marston Vale line London–Aylesbury line Metropolitan line Aylesbury–Princes Risborough line Marlow branch line Closed lines Varsity Line Great Central Main Line Banbury to Verney Junction branch line Brill Tramway Wycombe Railway Watlington and Princes Risborough Railway Cheddington to Aylesbury Line Aylesbury and Buckingham Railway Wolverton–Newport Pagnell line Bedford–Northampton line Other Chinnor and Princes Risborough Railway East West Rail Buckinghamshire Railway Centre Seer Green rail crash
Air	Denham Aerodrome Turweston Aerodrome Silverstone Heliport Wycombe Air Park
Waterways	Rivers River Thames River Great Ouse Canals Bedford & Milton Keynes Waterway (planned) Grand Union Canal Slough Arm Wendover Arm Aylesbury Arm
Footpaths	National Trails Thames Path The Ridgeway Long-distance footpaths Icknield Way (path) Chiltern Way Greater Ridgeway Midshires Way Ouse Valley Way Shakespeare's Way Swan's Way
Cycle paths	Route 4 Route 6 Route 51 Route 57
Related articles	v t e Transport in Milton Keynes Road Milton Keynes grid road system A421 A422 A4146 A5 A509 Watling Street (Roman road, "Old A5") Rail Bletchley Flyover Bletchley railway station Bletchley TMD Bow Brickhill railway station East West Rail Fenny Stratford railway station Marston Vale line Milton Keynes Central railway station Varsity Line West Coast Main Line Woburn Sands railway station Wolverton railway station Wolverton–Newport Pagnell line Wolverton and Stony Stratford Tramway Bus Buses in Milton Keynes Arriva Shires & Essex Milton Keynes Coachway MK Metro Stagecoach Midlands United Counties Omnibus Water Bedford & Milton Keynes Waterway (proposed) Cosgrove aqueduct Grand Union Canal Other transport Milton Keynes redway system (shared path network)

51°39′12″N 0°25′08″W / 51.65328°N 0.4189°W / 51.65328; -0.4189