A509 road

For the road fromEnniskillento the border with the Republic of Ireland, seeA509 road (Northern Ireland).

A509
Major junctions
North end	Kettering 52.3880°N 0.7147°W/52.3880; -0.7147(A509 road (northern end))
Major intersections	A14(J9) A45 A428 A422 M1(J14) A4146 A5
South end	Milton Keynes 52.0374°N 0.7819°W/52.0374; -0.7819(A509 road (southern end))
Location
Country	United Kingdom
Primary destinations	Kettering, Wellingborough, Milton Keynes
Road network
Roads in the United Kingdom Motorways A and B road zones
←A508 →A510

TheA509is a shortA-classroad (around 30 miles (48 km) long) for north–south journeys in south centralEngland,forming the route fromKetteringinNorthamptonshireto theA5inMilton Keynes,viaM1J14.

From north to south, the road begins atWicksteed Parkin the outskirts ofKettering.It then crosses theA14(where it becomes aprimary route) and goes throughIshamandGreat Harrowden.After this it goes on to form theWellingboroughwestern bypass before leavingNorthamptonshireto cross into theCity of Milton Keynes(andBuckinghamshire). From there, it crosses theA428at a roundabout and cuts through the centre ofOlney.South of Olney the road passesEmberton,meeting theA422just north-east ofNewport Pagnell,where the routes multiplex to form the Newport Pagnell eastern bypass. South of Newport Pagnell, the routes diverge at a roundabout with the A509 turning south and the A422 continuing westbound. Here the A509 is a single carriageway once more until it crosses the M1 at Junction 14, where it enters theMilton Keynes urban area.Continuing westwards from here, the road once more becomes a dual carriageway, running for a further 4 miles (6.4 km) past the edge ofCentral Milton Keynes(thecentral business districtof the city), to link up finally with theA5.Through Milton Keynes, the road is additionally known as thegrid roadH5 Portway.

Proposed Isham bypass

The A509 Isham Bypass is a proposal byNorth Northamptonshire Councilto improve transport links betweenKetteringandWellingborough,to improve access from Wellingborough to theA14,and to remove 'through traffic' fromIshamvillage.

A bid for Major Road Network funding was submitted to the Department for Transport in March 2020, with a Strategic Outline Business Case in December 2020. In October 2021, £1.859m of funding from the Department of Transport was secured towards the next stages of developing the proposals for the bypass. A planning application for the bypass was due to be submitted in July 2023.