Star.pngStar.pngStar.pngStar grey.pngStar grey.png

Portsbridge Roundabout

From Roader's Digest: The SABRE Wiki
Jump to navigation Jump to search
Portsbridge Roundabout
Location Map ( geo)
A3 approaching Portsbridge Roundabout, Hilsea - Geograph - 774022.jpg
The roundabout from the A3 to the south.
Cameraicon.png View gallery (8)
Highway Authority
National Highways
Roads Joined
A3, A27, A397
Junctions related to the A397

Portsbridge Roundabout is part of Junction 12 of the M27, this junction also bridges the channel separating Portsea Island from the British Mainland. The motorway that flys over the junction is part of both the M27 and M275.


The 1959 plans

It became a junction in the late 1920s, when the A3049 Western Road was built. This meant traffic leaving the island over Ports Bridge was now given the choice of three roads: the old Portsmouth Road through Cosham, the new Northern Road, and the brand new Western Road.

In 1935, Western Road became a spur of the A27. Initially two forks, when the tramways were removed it became a long, thin roundabout entirely on the mainland, with direct access to Donaldson Road. The Ports Bridge Hotel stood nearby.

In 1959, with a plan for bypasses of Cosham, etc, forming part of the South Coast Trunk Road, had the A3 route flying over the junction, with the E-W route planning on grinding to a halt.

This changed with the M27 plans, which put the flyover E-W, rather than N-S. This was to be a roundabout interchange - as were both the trumpet junction with the M275 north and the directional-T with the M275 south. As such, provision for west-facing slip roads exist on the current roundabout.

The A27 opened first with space left for the road to continue. The Portsbridge Viaduct over the top was added later.

In 1993, a proposal to extend the M27 to the A3(M) would have made this the M27's junction 13.


Route To Notes


(A3(M)), Portsmouth (E)


Hillsea, North End, Fratton, Copner, Portsmouth (W), Ferries


(M27, M275), Portsmouth (W), Paulsgrove, North Harbour, Fareham, Southampton


Waterlooville, Cosham, Highbury college, Southwick, London, Petersfield A397 number does appear on signs


London, Petersfield, Waterlooville, Southwick, Cosham now A397
Donaldson Road


Fareham (A27) now A27


The WEST, Southampton, Fareham, Portsmouth (W, C & Docks) (M275) provision made for slip roads off roundabout, however junction changes to the main M275 junction meant that weaving would be too great. Sign destinations off gantry above roundabout


London (A3(M)), Portsmouth (E), Havant, Brighton

Portsbridge Roundabout
Related Pictures
View gallery (8)
Portsbridge Plan for Fly-Over, 1959.jpgM27 J12 - according to Estate Publications - Coppermine - 13803.JPGM27 J12, according to OS - Coppermine - 13802.JPGM27 J12 - according to OS - Coppermine - 13805.jpgA3 approaching Portsbridge Roundabout, Hilsea - Geograph - 774022.jpg
Other nearby junctions
Pevensey to LewesPevensey Roundabout • Golden Jubilee Roundabout • Cop Hall Roundabout • Eastbourne Road Junction • Berwick Roundabout • Beddingham Roundabout
Lewes to LancingSoutherham Roundabout • Ashcombe Roundabout • Falmer Interchange • Coldean Interchange • Hollingbury Interchange • Patcham Interchange • Devils Dyke Interchange • Hangleton Interchange • Holmbush Interchange • Adur Interchange • Sussex Pad
Lancing to ClaphamLancing Manor Roundabout • East Worthing Crossroads • Grove Lodge Roundabout • Offington Corner
Clapham to ChichesterClapham Interchange • Poling Corner • Crossbush Junction • Causeway Roundabout • Ford Roundabout • Danes Crossroads • Fontwell East Roundabout • Fontwell West Roundabout • Boxgrove Roundabout • Templebar Interchange
Chichester By-passResort Hotel Roundabout • Portfield Roundabout • Oving Crossroads • Bognor Road Roundabout • Whyke Roundabout • Stockbridge Roundabout • Fishbourne Roundabout
Incomplete M27Warblington Interchange • Langstone Interchange • Bedhampton Roundabout • Broadmarsh Interchange • Farlington Interchange • Port Solent Interchange
M27 J12 - M27 J11Paulsgrove Interchange • Castle Street Roundabout • West Street Roundabout • Cornaway Lane Roundabout • Condor Avenue Roundabout • Delme Roundabout • Wallington Interchange
M27 J11 - M27 J9Quay Street Roundabout • Station Roundabout • Titchfield Gyratory • Mill Lane Junction • St. Margarets Roundabout • Segensworth Roundabout • Park Gate Interchange
Junctions on the A3
Bank • Monument • Borough • Elephant & Castle • Kennington Oval • Clapham Common • Wandsworth Gyratory • Tibbets Corner • Roehampton Lane • Stag Lane • Robin Hood • Coombe Lane • Shannon Corner • Malden Corner • Tolworth • Hook • Esher Common • Painshill • Wisley • Ockham Park • Send • Burpham • Stoke • Wooden Bridge • University • Hogs Back • Compton • Shackleford • Milford • Thursley • Hazel Grove • Liphook • Griggs Green • Longmoor • Ham Barn Roundabout • Flexcombe • Sheet • Berelands • Weston • QE Country Park • Clanfield • 1 London Road • 2 Hazelton • 3 Hulbert Road • 4 Purbrook Way • 5 Bedhampton Roundabout • Broad Marsh • Spur Road Roundabout • Paulsgrove • Portsbridge Roundabout • Rudmore • Church Street Roundabout • Cambridge Junction
Junctions on the M27 and spurs
M27Cadnam • 2 Ower • 3 Rownhams • 4 Chilworth • 5 Stoneham • Townhill Park • 7 Hedge End • 8 Windhover • 9 Park Gate • 10 North Hill • 11 Wallington • 12 Paulsgrove • 12 Hilsea
Unbuilt M27:13 Portsbridge • 14 Farlington • 15 Broad Marsh • Langstone • Warblington • Fishbourne Roundabout
M271Redbridge • 1 Nursling • 2 Rownhams • Romsey Road
M275Paulsgrove • Hilsea • 1 Tipner • 2 Rudmore Roundabout
Other spursOwer Rdbt • Swaythling • Portswood • Bevois Valley • Western Terminal • Allington Ln Rdbt • Mousehole Rdbt

SABRE - The Society for All British and Irish Road Enthusiasts
Discuss - Digest - Discover - Help