They failed to put it in when engineered making lane 7 and 8 obsolete
They failed to put it in when engineered making lane 7 and 8 obsolete
Probably more than you think it should be. There's the whole engineering of the slope so that it drains, compaction of the soil (which will be difficult for such a small spot), bringing in road building equipment (also tough for such a small spot)
The installation of the actual surface would probably be 30-50k
Doing the area in concrete would probably be a cheaper option, due to the difficulty getting large road building equipment into a small area. Normally, concrete would be much more expensive.