The first one only seems to have attracted Tumbleweed, lets see what happens with this one done in slightly different way using Sketch up 8.
Cobbinshaw raceway is on the shores of Cobbinshaw Reservoir in Lanarkshire in Central Scotland. (55'48"37N, 3'34"36W). I live just over 3 miles away in a straight line... but getting there would be anything but a straight line.
Measuring 5.664 km or 3.54 miles, the circuit runs anticlockwise with the back straight running parallel with a railway line that separates the circuit from the water.
Unlike most of my designs the circuit is 14.5 metres wide all the way around.
The railway line is the Edinburgh branch line of the UK rail Network's West Coast Main Line, The Split happening just a few miles South at Carstairs Junction. If the circuit were to be build there would be no difficulties in adding it's own station near the circuit.
As usual Comments Criticisms and possible edits are welcomed.