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A720 Sheriffhall Roundabout

Sheriffhall Roundabout is a key junction on the A720 Edinburgh City Bypass and connects to six A-class roads of local and regional importance, namely the A7 (north), the A6106 Millerhill Road, A720 (East), the A6106 Old Dalkeith Road, A7 (south), and A720 (west).

Status: 
In Preparation

Background

Currently, Sheriffhall Roundabout is the only junction on the trunk road A720 Edinburgh City Bypass which is not grade separated.

The at grade roundabout at Sheriffhall can lead to significant localised queuing, especially during the morning and evening peak periods.

Junction improvements at Sheriffhall were identified as part of the Strategic Transport Projects Review (STPR), published in December 2008. Intervention 22 recommends targeted road congestion/environmental relief schemes, including junction improvements at the Sheriffhall roundabout.

Aerial photograph of Sheriffhall Roundabout

The six-arm roundabout has undergone various improvements, including localised widening, the provision of additional lanes, and signalisation to try to alleviate the delays and long queues.

The area is underlain by numerous historical mine workings, and a geological fault which underlies the Roundabout. Although there is no longer any deep mining activity at Sheriffhall, potentially significant issues with ground conditions remain to be investigated, with mineral seams, fault zones and mine shafts all potentially within the area.

There are extensive plans for future residential and business development within the vicinity of Sheriffhall, including the South East Wedge (Shawfair) development. Sheriffhall also provides access to a number of growth areas, including the South East of Edinburgh where an Enterprise area has recently been established, and large developments along the A7 corridor. Sheriffhall also provides access from the east of Edinburgh City area to the growth areas around the West of Edinburgh and the M8 Corridor

The Borders Railway passes beneath the A720 Edinburgh City bypass via a tunnel approximately 300m east of the Sheriffhall Roundabout.

DMRB Stage 1 Assessment

Consulting Engineers, AECOM (previously URS) were appointed in June 2013 to undertake the Stage 1 Assessment.  The principal aim was to identify a range of grade separation improvement options. The study examined traffic flows in the area, as well as considering how a new grade separated junction would interact with the adjacent A720 junctions, including the Millerhill Interchange at the northern end of the A68 Dalkeith Bypass.

Eight junction options were reviewed in accordance with DMRB Stage 1 Assessment processes, namely:

  • Option 1 – Dumbbell Grade Separation at Sheriffhall
  • Option 2 – All slips provided at Gilmerton, no connection at Sheriffhall
  • Option 3 – Squareabout at Gilmerton, A7 bridged over A720
  • Option 4 – Collector Distributor, No Connection at Sheriffhall
  • Option 5 – Combined Gilmerton and Sheriffhall Junction
  • Option 6 – Grade Separated Roundabout at Sheriffhall
  • Option 7 – Dumbbell Grade Separation at Sheriffhall, Gilmerton Slips closed
  • Option 8 – Dumbbell Grade Separation West of Sheriffhall, Gilmerton Slips closed

The Stage 1 Assessment is complete and has concluded that Options 1, 2, 6 and 8 be taken forward for further assessment at Stage 2.  

An Executive Summary of the DMRB is available.

Stage 2 of the design process has now started. We will be undertaking further traffic surveys and traffic modelling, taking into account future transport growth. We will also be undertaking studies to gain a better understanding of the underlying ground conditions and will develop our understanding of environmental factors.

A further sifting exercise narrowed the four Stage 1 options down to the three emerging options.

The conclusion of Stage 2 work will help identify a preferred junction improvement from these options above.

Public exhibition - December 2016

We're holding a public exhibition to present the emerging options at the Sheriffhall Park & Ride Terminal Building, A7 Old Dalkeith Road, Danderhall EH22 1FF on Tuesday 6 and Wednesday 7 December 2016

Should you wish to attend, representatives from Transport Scotland and AECOM, will be in attendance to answer your questions. 

Materials presented at the exhibition

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