The A508 is a short A-class road for north/south journeys in south central England, forming the route from Market Harborough in Leicestershire, via Northampton, to Old Stratford, north-west of Milton Keynes.

The road begins in the centre of Market Harborough and crosses into Northamptonshire just outside the town. Crossing the A14 at Kelmarsh, it continues on through the centre of Northampton, merging with the A5199 as it enters the town. Through Northampton the road repeatedly switches between being a dual carriageway and a single carriageway.

From there, it merges briefly with the A45 until it crosses the M1 at junction 15. Resuming its identity, it continues through Roade, Grafton Regis and rural south Northamptonshire, reaching the A5 and the A422 at Old Stratford, a small town which adjoins Milton Keynes.

Between Market Harborough and Northampton, travelling south, there are two fixed (Gatso) speed cameras. The first is on top of the A14 junction (40 mph (64 km/h) limit) and the second is approx 0.5 miles (0.80 km) from the village of Lamport (60 mph (97 km/h) limit). Both of these cameras are rotated, meaning that they face the opposite direction of travel every so often. There is a further speed camera just south of junction 15 and another in Roade. The majority of the stretch between Northampton and Milton Keynes is national speed limit (60 mph (97 km/h)), although there are 30 mph (48 km/h) limits in Roade and Grafton Regis.

Ray White is a soul vocalist and rock and blues guitarist, best known as a member of Frank Zappa's touring ensembles. He was drafted into Zappa's band in the fall of 1976, being featured on rhythm guitar and vocals, forming a memorable vocal harmony partnership with Ike Willis on later tours in 1980 and 1984. White's vocals can be heard on Zappa in New York (March 1978), You Are What You Is (Sept 1981) as well as others. White can also be found on a The Torture Never Stops and Does Humor Belong in Music?; the former a DVD set in one of Zappa's last tours (without Ike Willis) and the latter being a VHS filmed at the pier in New York, the video features White and Ike Willis' signature vocal harmonies. According to Zappa, White, who was deeply religious, was uncomfortable with the atheistic views of some of the other band members, which led to his departure.

White has also worked with jam-oriented groups like KVHW, Don't Push the Clown and Umphrey's McGee since his contributions to the Zappa band, and has more recently worked with a variety of Michigan artists, including former Rare Earth drummer Bob Weaver, as well as members of the funk/fusion combo Generic Produce.