§ Mr. Bossomasked the Minister of Transport whether it is proposed to extend the experimental double white line markings introduced on the three-lane section of the Great North Road, A.1, in Lincolnshire to other three-lane roads; and what investigations have been arranged to ascertain whether this will be a more effective road safety measure than the introduction of a 50 miles per hour speed limit on three-lane roads.
§ Mr. Tom FraserThe experiment with the use of off-set double white line markings on straight three-lane roads already covers a number of roads, including sites on the A.1 besides the one in Lincoln-
298Wber of advance factories established, and the number of advance factories that have been completed or partially completed for which it has not yet been possible to find an occupant; and what information he has concerning comparative figures for areas not designated as development districts.
§ Mr. RedheadInformation in the exact form requested is not available. The figures below relate to new factory building—including extensions to existing premises—in Scotland for which industrial development certificates were issued from 1st November, 1964, to 31st May, 1965:
shire. It is not proposed to extend the use of this system further until we have assessed the results of the trials; this cannot be done before the end of this year if we are to allow a reasonable time for observation.
No special investigations have been arranged to ascertain whether the use of offset double lines on three-lane roads would he more effective than a 50 m.p.h. speed limit. When we have had experience with permanent 50 m.p.h. limits on three-lane roads we shall be in a better position to study the effects of the two measures—which are not mutually exclusive.
§ Mr. Bossomasked the Minister of Transport on what mileage of three-lane road it is proposed to apply a permanent 50 miles per hour speed limit.
§ Mr. Tom FraserAbout 155 miles.