§ 70. Mr. Jegerasked the Minister of Transport whether frost damage to trunk roads has now enabled the road research 197W authorities to determine the best type of road surface to be used in future.
§ Mr. MarplesResistance to frost damage is only one of the factors to be taken into account in determining the best type of road surface. In any case, frost damage depends not only on the type of surface but also on the quality and thickness of the carriageway foundation. The present design standards for new roads take account of both experience and the latest research. The effect on roads of the recent heavy prolonged frost will be studied to see if there are any further lessons to be learned.