A4008 road

It starts at Hatch End in the London Borough of Harrow at a roundabout on the A410. It runs North from the roundabout and is known as Oxhey Lane. After 1 mile it passes over the route of the Grims Dyke and Grimsdyke Golf Course is to the East. Very soon afterwards it passes in to Hertfordshire. At the border a white post with the shield of London on it marks the Greater London border. There is also a plate emblazoned with the name and arms of the former county of Middlesex. In the trees to the east, a BT microwave tower may be seen.

The road continues northwards passing the estate of Carpenders Park on its western side. There is also a cemetery here. 2 miles after crossing into Hertfordshire, the road enters the Borough of Watford. There is a pub, the Load of Hay on the western side and then a small green known as Watford Heath. The road swings eastwards and winds through the village of Oxhey, now a suburb of Watford. At Bushey Station, the northbound traffic runs straight on, whereas southbound traffic is via Chalk Hill and right into Aldenham Road . The road has now joined the A411 and passing under Bushey Arches at a roundabout and it becomes Lower Watford High Street. On the east of the road just after the roundabout there is a metal turnpike marker with a plaque commemorating it as the last of its type.

Wikipedia