|Location Map ( geo)|
|From:||Maybole (NE) (NS321117)|
|Distance:||14.9 miles (24 km)|
|Meets:||A77, B7045, B7034, A713, A70, B744, B743, A719|
|Route outline (key)|
The B742 is a C-shaped B-road in Ayrshire.
It starts on the A77 to the north of Maybole and heads northeastwards, narrowing almost immediately. After giving way to the B7045 at a crossroads it widens and starts to climb, preferring to be well above the River Doon rather than in its valley. However, the road does then descend to cross the river and enter Dalrymple. The B7034 comes in from the left and the B742 is the dominant number in a short multiplex which ends when the B742 TOTSOs left.
After reaching open country again the road goes under a railway viaduct before climbing up to reach the A713. This is crossed at a staggered crossroads and the road continues northeastwards. It passes to the north of Martnaham Loch, which is scarcely visible. Again the road remains on the top of the ridge rather than in the valleys. Soon the road reaches Coylton and a T-junction on the A70.
There is now a multiplex east through the village and the B742 then regains its number by turning left. It crosses the Water of Coyle before going over a ridge to cross a narrow bridge over the River Ayr. The road climbs out of the valley to go over a railway line and meet the B744. There is a short multiplex back over the railway line before the two roads separate and the B742 continues ahead into Mossblown. On the far side of the village the B743 is crossed at a staggered crossroads, after which the road goes under the railway line again before descending slowly across the fields. It ends on the A719, where that road has to TOTSO immediately before a roundabout on the A77 Prestwick bypass.
In 1922 the B742 only ran between the A77 at Maybole and the A70 in Coylton. In 1935 it was extended north via Mossblown to Monkton, where it reached the A77 again. This final section between the A758 (present B743) and A77 was the B713 but the remainder was an upgrade of an unclassified road.