asked the Secretary of State for Transport how many accidents have been reported as having occurred on the A1 trunk road in the vicinity of Darrington crossroads, West Yorkshire; and what were the effects in terms of personal injury, during each of the following periods (a) 2nd April 1974 to 31st December 1974, (b) 1st January 1975 to 31st December 1975, (c) 1st January 1976 to 31st December 1976, and (d) 1st January 1977 to the latest available date.

The information is as follows:

	Estimate £ million	Equivalent at November 1977 prices to £ million
October 1971	0·639	1·465
April 1972	0·661	1·479
November 1976	1·375	1·800
April 1977	1·535	1·800

That part of the additional estimated cost which is not attributable to inflation has arisen from refinements in design and the noise insulation requirements of the Land Compensation Act 1973.