Most expensive roads

Highways Agency major roads [1]

Road	Latest cost estimate	Cost increase
A14 Ellington -Fen Ditton	£1.2 billion	150% since programme entry, April 2003
A1 Dishford to Barton	£752 million	234% since programme entry, June 2002
M25 J16 - J23	£697 million	41% since programme entry, April 2004
M25 J27 - J30	£583 million	45% since programme entry, April 2004
A46 Newark-Widmerpool	£506 million	517% since programme entry, March 2001
A120 Braintree to Marks Tey	£444 million	Not yet approved, by has so far increased at least 41%.
A3 Hindhead	£381 million	256% since programme entry, March 2001
Mottram-Tintwhistle Bypass	£315 million	250% since programme entry, April 2003
M1 J6 - J10	£308 million	28% since programme entry,July 2003
M1 J34 - J37	£246 million	Down 48% since programme entry, March 2005

Local authority roads [2]

Road	Latest cost estimate	Cost increase
New Mersey Gateway	£431 million	10.5% since programme entry, March 2006
Carlisle Northern Route	£170 million	118% since programme entry, Dec 2000
Norwich Northern Distributor Road	£117 million	Not yet approved for programme entry
Bexhill-Hastings Relief Road	£99 million	110% since programme entry, Dec 2004
Weymouth Relief Road	£84.5 million	55% since programme entry, Dec 2003
A1073 Spalding to Eye	£80 million	79% since programme entry, Dec 2004
East Kent Access, part 2	£73 million	14.1% since programme entry, July 2006
A13 / A130 Sadler's Farm	£67 million	5% since programme entry, July 2006
M4 J11	£66 million	50% since programme entry, Dec 2000
Selly Oak Road	£58 million	62% since programme entry,Dec 2001

More road cost increases:

We've compiled the latest official Government figures on roads costs, from August 2008. Road costs keep soaring, though, so some roads may have grown in price since August. Contact us if you wish to be sure.

[1] The costs for these Highways Agency schemes come from a statement to the House of Commons by Roads Minister Tom Harris in March 2008 or the more recent Highways Agency's July 2008 costs estimate report (pdf).The A120 scheme (and cost increase) comes from the East of England's regional funding allocation analysis.

[2] Most of the costs for these local authority roads come from the Department for Transport, June 2008 (57k pdf). The cost increase for the East Kent Access plan comes from Kent County Council's cabinet minutes (28 March 2008); the Bexhill-Hastings link road increases from a recent cost reappraisal; the Mersey Gateway costs come from Halton Borough Council's website.

Better Transport

Roads

Local authority roads [2]

Alison Crane, Group Against Motorway Expansion