In the early 2000s West Sussex County Council began to look into options for closing all gaps on the A24 dual carriageway between Southwater & Ashington by providing several grade separated junctions or roundabouts at significant junctions along the A24. This was the result of a high level of collisions including several fatalities within a few years almost exclusively at the at-grade right turns.
As an initial measure in 2002 resulted in 60mph limits & speed cameras at some of the busy at-grade junctions, with development of a proper scheme being developed over the coming years. The most refined designs were produced in 2009 after many rounds of consultations. However was then completely dropped in 2011 due to not being value for money. Since the installation of speed cameras & lower speed limit in places, fatalities have dropped to 6 in the past 10 years (2011-2020), with only 2 of these being at right turns.
The scheme in general did have large public support, however as with all road projects there was an anti-improvement group worried with the increase of traffic these improvements would of bought, although this scheme was simply aimed at improving the safety and not capacity of the road in expectation of the increased demand due to large amount of new development in the area as well as addressing the existing safety concerns mentioned above.
In total the scheme was due to cost £35.3m (2008) (52.2m in 2022 prices) for starting construction in 2012/13. The county council was only going to have to pay for 10% of the works, whilst central government would fund the rest.
The as outlined would result in:
Vehicle restraint system in central reserve
28 gaps closed in central reserve
Three new Grade Separated Junctions at Dial Post, B2135 & A272 Buckbarn
Service Roads & improved accesses for properties with direct access to A24
PRoW diversions & improvments
Hard Strips in certain places
Final 2009 Plans
Horsham District Council has highlighted the area between Buck Barn & West Grinstead as a potential site for a new town, with this the council has suggested a whole host of mitigation measures such as Grade Separating the Buckbarn Crossroads (A24/A272), however other improvements may also be made along the A24 corridor.
Its also been highlighted many times in recent years the A24 corridor needs attention for active travel, so its likely in the next few decades there will be a package of improvements which may leave the A24 as a mostly limited access, grade separated two lane dual carriageway with a parallel dedicated cycleway.
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