APPENDIX 18 Stage 1 Road Safety Audit & Designers Response

707 Pages·2010·15.51 MB·English

by  Jacqui Bishop

APPENDIX 18

Stage 1 Road Safety
Audit & Designers
Response

Secondment & Outsourcing

ROOKERY RESOURCE FACILITY
GREEN LANE, STEWARTBY

STAGE 1 ROAD SAFETY AUDIT

2nd July 2010

Waterman Aspen Limited
Lockington Hall
Lockington
Derby
DE74 2RH
T 01509 674567
F 01509 674623
www.watermanaspen.co.uk

REV ISSUE STATUS PREPARED CHECKED APPROVED
BY/DATE BY/DATE BY/DATE
1 Draft C Young P Chapman
2 Final C Young P Chapman
Secondment & Outsourcing

Disclaimer note
This report has been produced solely for the use of the client and shall not be assigned to, or
relied upon by others without the express written permission of Waterman Aspen Ltd.
Secondment & Outsourcing

Rookery Resource Facility – Green Lane, Stewartby

CONTENTS

1.0 INTRODUCTION 2
2.0 THE PROPOSALS 2
2.1 DOCUMENTS AND INFORMATION NOT PROVIDED 3
3.0 ACCIDENT HISTORY 3

AUDITOR’S EVALUATION

4.0 MATTERS ARISING FROM THE ROAD SAFETY AUDIT 4

5.0 GENERAL COMMENTS 7

APPENDICES

APPENDIX ONE

6.0 ROAD SAFETY AUDIT TEAM STATEMENT 9

APPENDIX TWO

7.0 PROBLEM LOCATION PLAN 10

APPENDIX THREE

8.0 LIST OF DRAWINGS AND DOCUMENTS PROVIDED TO THE AUDIT TEAM 12

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Rookery Resource Facility – Green Lane, Stewartby

1.0 INTRODUCTION

1.1 This report is a Stage One Feasibility Stage Road Safety Audit (RSA) carried out on the above
scheme at the request of Waterman Boreham Ltd.

1.2 The RSA team, staff members from Waterman Aspen, present at the RSA were:

Chris Young AMIHE AMCIHT MSoRSA
Audit Team Leader

Peter Chapman B Eng (Hons) C Eng MICE MCIHT
Audit Team Member

We confirm that no member of the Audit Team has been involved with the design process

1.3 A site visit was carried out on Friday 2nd July 2010 at 10:00hrs. The weather during the site visit
was overcast with a dry carriageway surface.

1.4 The RSA brief issued to the team comprised various elements listed at Appendix Two.

1.5 The terms of reference of the RSA are as described in the Design Manual for Roads and Bridges
HD19/03 – Road Safety Audit. This standard has been used for guidance only. The RSA team
has examined and reported only the road safety issues of the scheme as presented and has not
examined or verified the compliance of the design to any other criteria.

All of the problems described in this report are considered by the RSA team to require action in
order to improve the safety of the scheme and minimise collision occurrence.

PLEASE NOTE: If any of the problems or recommendations within this RSA report are not
accepted, a signed exception report is required by the RSA Team Leader.

1.6 No previous RSAs have been carried out by Waterman Aspen.

2.0 PROPOSALS

The scheme comprises of the construction of a new priority junction vehicular access to the new
development, with associated localised carriageway widening to facility a new ghost right turn bay
within Green Lane.

The unadopted new internal access road is to be traffic calmed along with other associated
improvements to non-motorised user facilities on the approaches to the development.
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Secondment & Outsourcing

Rookery Resource Facility – Green Lane, Stewartby

2.1 DOCUMENTS AND INFORMATION NOT PROVIDED

DEPARTURES FROM STANDARD

No Departures from Standard have been highlighted to the RSA team.

SWEPTPATH ANALYSIS

No details of any vehicle sweptpaths were provided to the audit team

3.0 ACCIDENT HISTORY

3.1 The personal injury accident data supplied within the Road Safety Audit Brief for the period of
January 2004 to January 2009 summarised four personal injury collisions along the section
of Green Lane included within this scheme, one of which resulted in a fatality. No collisions
were recorded within this period for Stewartby Way.

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Rookery Resource Facility – Green Lane, Stewartby

4.0 MATTERS ARISING FROM THIS (STAGE ONE) ROAD SAFETY AUDIT

4.1 Location: Green Lane east of the proposed new development access

4.1 Problem

Summary: Risk of vehicle loss of control type collisions

The location of the proposed central pedestrian refuge on the apex of the bend is cause for
concern. Site observations showed the majority of vehicles travelling east to west were travelling
at elevated speeds and were noted to encroach across the centre line to straight line the bend. As
a consequence drivers may not be aware of the presence of the new refuge due to the limited
forward visibility available.

Recommendation

Relocate the pedestrian refuge to the east away from the carriageway bend, and provide colour
surface infill within the tapered lead in to the right turn lane to deter vehicles from overrunning this
section.

4.2 Location: Green Lane east of the proposed new development access

4.2 Problem

Summary: Risk of pedestrian / vehicle conflict

The location of the proposed central pedestrian refuge on the apex of the bend is cause for
concern. The presence of a mature hedge line along the northern highway boundary reduces the
visibility splays to and from the northernmost pedestrian crossing point. Albeit acknowledged the
pedestrian visibility splays to the east are improved significantly when taken from the centre of the
proposed pedestrian refuge.

Recommendation

Notwithstanding the recommendation made within point 4.1 of this report, remove the hedge line
overgrowth back to the highway boundary. Note this will also provide increased visibility splays for
vehicles exiting the new development access.

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Rookery Resource Facility – Green Lane, Stewartby

4.3 Location: Green Lane adjacent to the new site access

4.3 Problem

Summary: Risk of vehicle conflict

The introduction of the ghost right turn bay results in the eastbound through lane being reduced to
approximately 3.0m in width, this along with the excessive horizontal deflection will result in
eastbound traffic overrunning the central right turn lanes to straighten the movement through this
section potentially conflicting with other vehicles.

Recommendation

Provide a central splitter island to prevent vehicles from encroaching into the right turn lane.
However ensure the location does not impede the sweptpaths of long vehicles exiting the new
development access road.

4.4 Location: Green Lane adjacent to the new site access

4.4 Problem

Summary: Risk of head on type vehicle conflicts

The proposed forward visibility splays for right turning traffic into the new development is notably
impeded by the carriageway horizontal alignment and presence of a mature hedge line to the rear
of the highway boundary. As slow moving right turning traffic may not have an adequate clear
visibility envelope to enable them to safely complete the turning movement.

Recommendation

Remove all the overgrowth to the extent of the highway boundary, and provide warning signage
on the westbound approach to forewarn drivers of the pending hazard.

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Secondment & Outsourcing

Rookery Resource Facility – Green Lane, Stewartby

4.5 Location: Green Lane west of the proposed access

4.5 Problem

Summary: Risk of sideswipe type vehicle conflicts

Adjacent to the development on the westbound approach to the railway level crossing, is a signed
dedicated waiting point for large /slow vehicles to stop and use the nearby telephone to gain
permission to cross at the level crossing. Large stationary vehicles at this point will obstruct
sightlines for vehicles exiting the new development.

Recommendation

In the absence of an identifiable alternative suitable large / slow vehicles waiting point, determine
the frequency of large / slow vehicles waiting at this location to enable a risk assessment to be
undertaken to establish the likelihood of a potential conflict occurring as a result of this issue.
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