From Roader's Digest: The SABRE Wiki
|The eastern side of the roundabout. The damaged arches can be seen.|
|Type :||Roundabout with flyover|
|Roads Joined :||A27, A32|
|Location :||Fareham, Hampshire|
|Junctions on the A32|
Due to the gradients and space involved, the north-facing sliproads are much longer and gentler than the south-facing ones.
Despite the presence of the flyover, the preferred route to the town centre was (and still is) to leave here and use Wallington Way. The flyover carries traffic heading to Gosport and west Fareham.
|The West, Southampton, Brighton, Portsmouth||Spur of the A27, signed as '(M27)'|
|Titchfield, Gosport, Lee-on-the-Solent, Stubbington, Newgate Lane industrial parks (A32)|
|Alton, Wickham, industrial parks|
|Wallington Village||Wallington Shore Road|
In the BeginningA27), which met Shore Road (now Wallington Shore Road) and Cams Hill (also the old A27) at a wide junction just north-east of the present junction, where there is now a bend in the two roads. Pinks Hill and the entrance to Cams Hall also joined here, with the latter now getting a signal-controlled exit on the A27.
There is a local story that a small plane once collided with the railway viaduct, damaging two arches. These were then replaced by one larger arch, aligned to suit what was then the A27, with a smaller, bricked-up arch filling the remaining gap. It's not clear how true this is.
Fareham's southern bypass was built around the same time of the M27 in anticipation of its completion. The new junction interrupted the previous ones, with Wallington Shore Road broken in two, Pinks Hill meeting the sliproad to the new Eastern Way, and East Street meeting the roundabout on the other side. Deanes Park Road was cut off by the new A27 at its western end, so instead it was plugged into the junction at its eastern end.
For a very short period, the A27 west of here had a flared approach to the junction, where the M27 was yet to be added.
A few years later the A32 Wallington Way (eastern bypass) was built and plugged into the junction.
Photos suggest that the eastern side of the roundabout (the tightest end) is not on its original alignment: the two cul-de-sacs can be seen in use in some early pictures.
Although the junction separates the town centre, a residential area and a secondary school, pedestrians are expected to cross the various dual carriageways and sliproads with little assistance. After a serious accident the council agreed to improve one of the entry slips at a cost of £150,000, but this later turned out to consist of four bollards and a new road sign.
A year later the council did replace this with pedestrian signals, at the same time reducing the sliproad to a single lane and upgrading the signals on the exit slip to include pedestrian facilities, despite fears this would exasperate congestion. They said they wouldn't do this to the sliproads on the other side as the angle of approaching traffic would make it more dangerous. Lots of hatching has been added to try and improve this, but there is still a problem with traffic crossing the hatching and changing lanes at the last minute (see layout).
Most evenings traffic from the A32 Gosport Road stretches back onto the flyover. On busy days, this will also stretch down the sliproad, across the roundabout and back up the other side. The A27 also gets very busy trying to join the road, often resulting in tailbacks. It's thought a set of traffic lights prior to the junction have been adjusted to reduce the amount of traffic joining the junction at once.
Unlike most junctions of this size, there is no spiralling system in place. Instead, traffic heading between the A27 westbound and the M27 has to move over half way round, exactly as traffic from the A32 joins, causing confusion and near-misses. The signage and markings don't warn of this, instead hatching was added prior to the M27 exit to get traffic to get in lane sooner. However, this is of no use to people who aren't familiar with the junction, who instead have to cut across the markings.
This lane arrangement pre-dates both the M27 and Wallington Way, which is probably why it doesn't work well today. It could be solved by having a lane drop at the A32 exit.
The size of junction and variety involved means that at night it can be a popular place with local 'boy racers'. In 2008 a speeding vehicle fell from the roundabout into the river.
When the junction is busy, traffic heading from the motorway use the lane for the A27 east (which is often clear), and then cut across at the last minute. For no clear reason, many vehicles also try to access the A32 from lane two.