A77 (Monkton-Kilmarnock) Mr. Sillars asked the Secretary of State for Scotland what was the average cost per mile of the dual carriageway construction of the A77 Monkton to Kilmarnock road; and what was the figure at cost and 1977 prices, respectively. Mr. McElhone Approximately £0·6 million at cost and £1·2 million at 1977 prices.