HC Deb 24 February 1970 vol 796 c276W
59. Mr. Ronald Bell

asked the Minister of Transport whether he will take immediate action to reduce the danger from flying stones on the Buckinghamshire section of M4, and to devise means of improving road adhesion other than top-dressing with loose chippings.

Mr. Bob Brown

Drivers on the M4 should observe the warning signs and advisory speed limits exhibited from time to time by the police, who are keeping the condition of the surface under close observation. Studies of the problem are continuing.