Fringe Box

Socialize

Twitter

Opinion: Significant Road Improvements Needed For Any Newlands Corner Development

By Frank Phillipson

Further to my previous article on improvements needed if there is an increased use of the access to Newlands Corner, additional investigation has been carried out.

The sketch proposal showed the access to Newlands Corner moved northwards and provision of a right-hand turning lane. Click here to read previous article.

Where the earlier sketch showed the location of the proposed new access to be, the sight line southwards is impeded by the gradient and crest of the hill.

View of sight line southwards from revised proposed access point.

View of sight line southwards from revised proposed access point.

To achieve adequate visibility in this direction that provides an acceptable stopping sight distance (SSD or ‘y’ distance) the proposed access needs to be moved further northwards and a maximum speed limit of 40mph imposed on all the approaches to Newlands Corner. This will then give an absolute minimum SSD of just over 90m (see diagram).

Revised sketch of Newlands Corner access and right-hand turn lane. Click to enlarge in a new window.

Revised sketch of Newlands Corner access and right-hand turn lane. Click to enlarge in a new window.

Imposing a 40mph speed limit would also be beneficial to pedestrians and horse riders.

Opinion Logo 2With regard to the provision of the ghost island right-hand turn lane, according to Highways England’s Design Manual for Roads and Bridges (DMRB) the requirement to provide this is reached when the traffic flow on the minor road or access carries a two-way (in and out) annual average daily traffic (AADT) level of 500 vehicles.

Surrey County Council claims that its traffic survey (carried out in 2004 and 2007) gives a figure of 122,000 vehicles visiting Newlands Corner per year. If this is taken as being the total ‘In’ and ‘Out’ (i.e. two-way movements) the AADT for Newlands Corner is 334.

However, given that the proposed development would lead to increased in vehicle numbers and that the DMRB states that a right-hand turn lane should be provided if the following apply:

1. If there is a likelihood of right turning accidents.

2. If vehicles on the major road waiting to turn right inhibit the through flow and create a hazard.

3. If there is high seasonal variations, or short, intense peaks in the traffic flow.

The provision of a ghost island right-hand turn lane would therefore seem to be justified.

Recorded Accidents at Newlands Corner January 2012 to August 2015. Click to enlarge in a new window.

Recorded Accidents at Newlands Corner January 2012 to August 2015. Click to enlarge in a new window.

If Surrey County Council’s figure of 122,000 per year just represents the number vehicles visiting Newlands Corner then this figure needs to be multiplied by two to represent all the inward and outward movements by these vehicles. The annual two-way figure then becomes 244,000 vehicle movements which gives an annual average daily traffic (AADT) level of 668 vehicles. If that is the case it means that the existing access should already have a right-hand turning lane.

Share This Post

One Response to Opinion: Significant Road Improvements Needed For Any Newlands Corner Development

  1. Mike Pugh Reply

    April 13, 2016 at 10:30 pm

    The revised sketch of a possible realignment of the access to Newlands Corner car park will lead to a significant amount of woodland clearance.

    An alternative, and perhaps safer and less expensive option might be to construct a four-exit roundabout at the junction with Trodds Lane, with the new access road to the car park hugging the existing westbound A25 lane until it meets the existing access to the car park.

Leave a Reply

Your email address will not be published. Required fields are marked *