The line goes along the side of my next door neighbour's house. I realise that it would never be reinstated but it would nevertheless make an excellent narrow gauge tourist line between the edge of Harpenden and Luton Airport Parkway - plenty of nice scenery with Luton Hoo on the opposite side of the valley and the River Lea which has beren dammed to form artificial lakes in the grounds of Luton Hoo, and the "real" railway on the opposite side of the trackbed, and also visible from the B653. If I ever won Euro Millions,thats what I'd try to spend part of the money on particularly as there is a lack of reailway preservation sites in the area, apart from at Leighton Buzzard 20 odd miles away.
It goes right past a particularly smelly sewage works where you're describing!
I'd agree with the others suggesting that re -opening the railway would have made a lot more sense than the busway. The road between Dunstable & Luton gets very congested, and i suspect a good deal of that traffic is people driving to the station.