From Roader's Digest: The SABRE Wiki
|From:||Leighton Buzzard (SP916234)|
|Length:||12.2 miles (19.6 km)|
|Meets:||A4146, A5, A5130, A507|
|Former Number(s):||A4146, A50, A418|
|Route outline (key)|
A rural road in Bedfordshire, the A4012 has been extended in both directions.
Originally the A4012 began on the A418 in the centre of Leighton Buzzard. In 2007, the A4146 was rerouted out of town with the building of the western bypass and the A4012 was extended south to meet the A505 southern bypass. More recently still, this extension was moved slightly west to serve an industrial estate rather than a residential area and so now starts on the A4146 rather than the A505.
East of Leighton Buzzard, the A4012 crosses the narrow gauge Leighton Buzzard Railway, whose southern end it went past on its 2007 route (and whose northern end is at Stonehenge - but not the one on Salisbury Plain!) at a level crossing with give-way signs rather than barriers. The road continues east, zigzagging across the fields to reach the A5 at Hockliffe.
In 1922 - and for over 50 years afterwards - the A4012 ended here. Then the A50 which started more-or-less opposite was cut back to Northampton, so the A4012 was extended along part of its old route. The A4012 now crosses the A5 at a staggered junction between adjacent sets of traffic lights before passing to the west of Woburn Abbey to reach the village of Woburn. The A50 continued straight from here along what is now the A5130 but the A4012 TOTSOs right along the former A418, continuing to skirt Woburn Park. The 1970s extension ended on the A507 at Husborne Crawley but with that road's rerouting as part of the upgrade scheme for M1 junction 13 in the 2000s, the A4012 now continues straight (along a formerly unclassified road) to go under the M1 and end at a roundabout on the new A507 close to Ridgemont Station.