Supplementary Stage 1 Road Safety Audit Designer's Response
Supplementary Stage 1 Road Safety Audit Designer's Response
Supplementary Stage 1 Road Safety Audit Designer's Response
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
M1 Junction 19 Improvement<br />
<strong>Stage</strong> 1 <strong>Road</strong> <strong>Safety</strong> <strong>Audit</strong> Designer’s <strong>Response</strong> /<br />
Exceptions Report<br />
Problem 12 - Speed enforcement on these links<br />
Entry to M6 – M1 Southbound Link, M1 – M6 Northbound Link, M1 – A14<br />
Eastbound Link and A14 – M1 Northbound Link<br />
Problem<br />
These links have a design speed of 85kph<br />
and as such drivers entering onto these<br />
links must be made aware of the reduced<br />
speed limit and enforcement may be<br />
necessary.<br />
Recommendation<br />
Provide speed limit signs on entry to all of<br />
these links and provide details of how the<br />
speed limit will be enforced.<br />
Designer’s <strong>Response</strong><br />
The four interchange links proposed as part of the Preferred Route and presented on the<br />
drawings reviewed by the <strong>Road</strong> <strong>Safety</strong> <strong>Audit</strong> team have been designed in accordance<br />
with the requirements of TD22/06 Layout of Grade Separated Junctions. The design<br />
speed of 85kph is in accordance with the requirements of Table 4/1 of TD22 for an<br />
interchange link between rural mainlines with a design speed of 120kph.<br />
A minimum stopping sight distance (SSD) of 160m is proposed between the back of<br />
diverge layout nose and the back of the merge layout nose. Full mainline SSD of 295m<br />
is proposed over the full length of the merge and diverge layouts in accordance with the<br />
requirements of TD 9 (Highway Link Design) and TD 22.<br />
However, should the issue continue to be raised in subsequent <strong>Road</strong> <strong>Safety</strong> <strong>Audit</strong>s<br />
consideration could be given to the provision of an advisory 50mph or 60mph speed limit<br />
and additional traffic signs.<br />
Exception<br />
The Designer requests an exception as provision of speed limits on these four<br />
interchange links is not considered necessary and would not be in keeping with current<br />
practise at other similar locations on the motorway and trunk road network.<br />
Rev.:1<br />
13 Issued: February 2010