appendix i stage 1 road safety audits and designers’ responses · mciht, msorsa, he cert comp....

The Rail Central Rail Freight Interchange and Highway Order 201[x] Document 6.1.17.1 Ashfield Land Management Limited and Gazeley GLP Northampton s.à.r.l. Transport Assessment

1211-80/TA/01 Transport Planning Associates August 2018 Appendix I

APPENDIX I Stage 1 Road Safety Audits And

Designers’ Responses


1211-80/TA/01 Transport Planning Associates August 2018 Appendix I.1

APPENDIX I.1 Junction 5 RSA 1 and Designer’s

Response

Road Safety Engineering

RAIL CENTRAL, NORTHAMPTONSHIREM1 Junction 15A

Stage 1 Road Safety AuditRequested by Transport Planning Associateson behalf of Highways England

June 2018

Gateway TSP is part of Motion Consultants Limited, registered in England Number 05185065Registered Office: 84 North Street, Guildford GU1 4AU


84 North StreetGuildfordSurreyGU1 4AU01483 [email protected]

Project: Rail Central, NorthamptonshireM1 Junction 15A

Client: Transport Planning Associateson behalf of Highways England

Document: Stage 1 Road Safety Audit

Gateway TSP ref: WP/SG/1805025 RSA1-05 v1.1

Issue date: 10 July 2018

Status: Final v1.1

Authorised by: WP

© Copyright Gateway TSP 2018

Page i Rail Central, NorthamptonshireStage 1 Road Safety Audit

Ref: WP/SG/1805025 RSA1-05 v1.1June 2018

CONTENTS

1 Introduction ................................................................................................. 1

2 Items Considered by this Road Safety Audit .......................................................... 4

3 Problems Identified by this Road Safety Audit ....................................................... 5

4 Audit Team Statement .................................................................................... 7

Appendices

Appendix A: Location Plan

Rail Central, NorthamptonshireStage 1 Road Safety Audit


1 INTRODUCTION

1.1 This report describes a Stage 1 Road Safety Audit (RSA) of proposed improvements to

the M1 Junction 15A associated with the proposed Rail Central Strategic Rail Freight

Interchange (SRFI), in Northamptonshire, at the request of Martin Seldon, the

Highways England Project Sponsor.

1.2 The Road Safety Audit was carried out during June 2018. The Road Safety Audit Team

membership approved by Martin Seldon, the Highways England Project Sponsor, was

as follows:

Wendy PalmerMCIHT, MSoRSA, HE Cert Comp.Gateway TSP

Steve GilesBEng (Hons), IEng, FIHE, MCIHT, MICE, CMILT, MSoRSA, HE Cert Comp.Gateway TSP

1.3 The current dumbbell roundabout arrangement is proposed to be amended to include

an enlarged signalised roundabout at the north, and a complex signalised T-junction

arrangement at the south. The purpose of the improvements is to improve junction

capacity, such that it mitigates the impact of Rail Central at this location.

1.4 The scheme will comprise the following:

Southern Roundabout

i) replacement of the existing roundabout with a signalised junction

arrangement to facilitate all existing movements as well as a proposed left-

in/left-out site access;

ii) provision of two through lanes in either direction for traffic travelling north

and south on the A43;

iii) provision of a left turn lane for the A43 south approach;

iv) provision of two right turn lanes for the A43 north approach;

v) provision of two right turn lanes for the A43 west approach;



vi) provision of a left turn lane for the A43 west approach; and

vii) provision of yellow box road markings.

Northern Roundabout

i) signalisation of both A43 approaches and the A5123 approach, as well as

three corresponding traffic signals on the circulatory carriageway;

ii) widening of the circulatory carriageway and provision of road markings on

the circulatory carriageway;

iii) additional lanes on the A43 south approach;

iv) additional nearside lane on the A43 west approach;

v) additional offside lane on the A5123 approach; and

vi) additional off side lane on the A5123 exit.

1.5 This Road Safety Audit took place at the Guildford office of Gateway-TSP on 6th and

7th June 2017. The audit was carried out in accordance with the Road Safety Audit

Brief provided by Martin Seldon, Project Sponsor, Highways England. The Road Safety

Audit comprised an examination of the documents provided, as listed in Chapter 2.

The Audit Team visited the site together on Thursday 7th June 2018, between 14.30

and 15.15 hours, when the weather was sunny and windy, and the road surface dry.

Traffic flows were as would be expected at the time of day.

1.6 Colin Bancroft of Highways England Area 7 Road Safety Team also provided comments

on the proposals.

1.7 The terms of reference for this RSA are as described in the Design Manual for Roads

and Bridges (DMRB) document HD19/15. The Audit Team is independent of the project

design team and has not been involved in the design process in any other capacity.

The audit considers only the potential road safety implications of the scheme and has

not verified compliance of the design with any other criteria.



1.8 There are no departures from standard. Relaxations of horizontal geometry on the

exits from the complex signalised T-junction heading south of two steps below

desirable minimum (510 m radius), in order to reduce vehicle speeds through the

proposed junctions.

1.9 Recommendations are aimed at addressing the identified potential road safety

problems. All problems / recommendations identified in this report are referenced

to the design drawings and are referenced on the location plan included at Appendix

A to this report. The recommendations contained herein do not absolve the Designer

of his/her responsibilities.



2 ITEMS CONSIDERED BY THIS ROAD SAFETY AUDIT

2.1 The approved Road Safety Audit Brief supplied by the Project Sponsor to the Audit

Team consisted of the following information;

Document ref. Rev. Originator Title

1211-80 Fig 3.1 - tpa Local Highway Network and PublicRights of Way

1211-80 PL05 B tpa M1 Junction 15A – PotentialImprovements

Additional/background information provided to the Audit Team

· RSA Brief ref 1211-80/RSA1/05; dated 19/4/18

· PIC Data 2013-2016

· Queue length and turning count surveys – M1 Jns 15 & 15A, sites 1-5; 10/3/18

2.2 The Audit Team consider that the contents of the Audit Brief are sufficient for the

purposes of undertaking this Road Safety Audit as instructed.



3 PROBLEMS IDENTIFIED BY THIS ROAD SAFETY AUDIT

General Matters

3.1 The Audit Team raises no concerns at this Stage 1 RSA in respect of general matters.

Local Alignment

3.2 Problem

Restricted visibility to signal heads would lead to nose to tail or t-bone collisions.

Location: northbound approach to proposed signalised roundabout north of M1

The proposed northbound approach to the signalised roundabout emerges from the

M1 overbridge. Should a high sided vehicle be stopped at the stop line in front of the

signal head it would block visibility for northbound drivers, leading to nose to tail or

t-bone collisions.

Recommendation

Visibility to the traffic signal heads should not be obstructed should a high sided

vehicle be stopped at the stop line.

3.3 Problem

Back of queue may obstruct ‘ahead’ traffic leading to side swipe and nose to tail

collisions

Location: southbound approach to ‘The North (M1)’ off-slip

The southbound lanes running under the M1 from the proposed northern roundabout

to the proposed southern junction, split as they emerge from the overbridge to two

straight ahead lanes and two new right turn/ off-slip lanes for The North and M1. The

off-slip would store approximately six cars before the back of the queue would

overhang the straight ahead offside lane. This would be at a point where vehicles

emerge from the shadow of the overbridge, leading to side swipe and nose to tail

collisions.



Recommendation

Queue lengths and signal timings should be calibrated to avoid queueing in the

southbound ‘ahead’ lane.

Junctions

3.4 The Audit Team raises no concerns at this Stage 1 RSA in respect of junctions.

Non-motorised User Provision

3.5 The Audit Team raises no concerns at this Stage 1 RSA in respect of non-motorised

user provision.

Road Signs, Carriageway Markings and Lighting

3.6 Problem

Confusion caused by simplified sign faces may lead to side swipe collisions.

Location: signalised junction south of M1

The proposed simplified sign faces on the approaches to the southern signal junctions

may be confusing to drivers as they do not represent the physical junction layouts.

This may lead to late lane change and side swipe collisions.

Recommendation

The diagrammatic information provided on the sign faces should represent the layout

and lane directions.



4 AUDIT TEAM STATEMENT

4.1 We certify that this Road Safety Audit has been carried out in accordance with DMRB

document HD 19/15.

Audit Team Leader

Wendy PalmerMCIHT, MSoRSA, HE Cert CompRoad Safety Engineer

Signed:

Date: 12th June 2018

Audit Team Member(s)

Steve GilesBEng (Hons),IEng, FIHE, MCIHT, MICE, CMILT, MSoRSA, HE Cert CompDirector & Senior Road Safety Consultant

Signed:


Audit Observer

Colin BancroftHighways England (Area 7)Stirling HouseLakeside Court, Osier DriveSherwood Business ParkNottinghamNG15 0DS

3.2

3.3

3.6

3.6

Designer’s Response to Stage 1 Road Safety Audit

RSA Reference: WP/SG/1805025 RSA1-05 v1.1 June 2018

Rail Central, Northamptonshire – M1 Junction 15A

Response to Recommendations.

3.2 Agreed. Signal heads to be located to avoid obstruction and confirmed through the detailed design.

3.3 Agreed. Queue lengths and signal timings have been calibrated in order to avoid queueing in the southbound ahead lane.

3.6 Agreed. It is acknowledged that signs should be more specific to the junction layout, but these would be non-standard signs that would need to be agreed with Highways England (HE) and the Department for Transport (DfT).

END

S. Boland Designer Date: 17 August 2018



APPENDIX I.2 Junction 14 RSA 1 and Designer’s

Response


RAIL CENTRAL, NORTHAMPTONSHIREA43/ A5 Tove Roundabout


June 2018




Project: Rail Central, NorthamptonshireA43/ A5 Tove Roundabout





Status: Final v1.1

Authorised by: WP




CONTENTS

1 Introduction ................................................................................................. 1




Appendices




1 INTRODUCTION


the A43/ A5 Tove Roundabout associated with the proposed Rail Central Strategic Rail

Freight Interchange (SRFI), in Northamptonshire, at the request of Martin Seldon, the




as follows:


Steve GilesBEng (Hons),IEng, FIHE, MCIHT, MICE, CMILT, MSoRSA, HE Cert Comp.Gateway TSP

1.3 The scheme is to provide improvements to the A43 / A5 Tove Roundabout, to improve

junction capacity such that it mitigates the impact of the proposed Rail Central

Strategic Rail Freight Interchange (SRFI) development. The scheme will comprise the

following:

i) reconfiguration of the roundabout and an increase in the size of the central

island;

ii) lengthening of an existing lane and the provision of an additional lane on

A43 south approach;

iii) reconfiguration and widening of the Towcester Road approach to

accommodate an additional give way lane;

iv) lengthening of an existing lane and provision of an additional lane on the A5

(north)approach;

v) widening of the circulatory carriageway between the A5 (north) and the A5

(south) to provide an additional lane; and

vi) provision of a merge lane on the A5 north exit.



1.4 This Road Safety Audit took place at the Guildford office of Gateway TSP on 6th and





and 12.15 hours, when the weather was fine, and the road surface dry. Traffic was

heavy and queuing throughout due to an incident in Towcester.

1.5 Colin Bancroft of Highways England Area 7 Road Safety Team also attended the site

visit as an observer.






1.7 The Audit Team has not been made aware of any Departures from Standard. Whilst

reference may be made to design standards, this report is not intended to provide a

design check.












1211-80 EL14 - tpa Tove Roundabout – Existing Layout

1211-80 PL14 F tpa Tove Roundabout – PotentialImprovements



· Personal Injury Collision Records

· MCC Survey Data

· Forecast Traffic Flows

· Junction Capacity Assessment Technical Note






General Matters


Local Alignment

3.2 Problem

HGVs overhanging adjacent lanes may lead to side swipe collisions.

Location: throughout the scheme

HGV movements were observed during the site visit and were seen to encroach on

adjacent traffic lanes. Where the lane widths and circulatory carriageway are being

altered it is not clear how the HGVs will navigate the new alignments. This could lead

to side swipe collisions.

Recommendation

Swept path analysis should be carried out for HGV movements throughout the scheme

and, if necessary, adjustments made to the layout.

Junctions



3.4 The Audit Team raises no concerns at this Stage 1 RSA in respect of non-motorised

user provision.


3.5 Problem

Gap accepting vehicles entering the roundabout together may lead to lane change

and side swipe collisions



Location: Towcester Road eastbound approach to uncontrolled roundabout entry.

Towcester Road eastbound approach to the roundabout is currently marked as one

lane with give-way marking. It is proposed to realign this corner of the junction,

relocating the give-way further to the west and providing a short flare, thereby

increasing it to two lanes at the give-way line. Two vehicles accepting gaps to enter

the roundabout together, both wishing to circulate, may lead to lane change and side

swipe collisions in the circulatory carriageway.

Recommendation

Guidance should be provided for drivers turning left and travelling straight ahead to

use the nearside and offside lanes respectively.





document HD 19/15.

Audit Team Leader


Signed:




Signed


Audit Observer


3.5

Problem 3.2Throughout Scheme


RSA Reference: WP/SG/1805025 RSA1-05 v1.1 June 2018

Rail Central, Northamptonshire – M1 Junction 15A


3.2 Agreed. Signal heads to be located to avoid obstruction and confirmed through the detailed design.

3.3 Agreed. Queue lengths and signal timings have been calibrated in order to avoid queueing in the southbound ahead lane.

3.6 Agreed. It is acknowledged that signs should be more specific to the junction layout, but these would be non-standard signs that would need to be agreed with Highways England (HE) and the Department for Transport (DfT).

END




APPENDIX I.3Junction 15 RSA 1 and Designer’s

Response


RAIL CENTRAL, NORTHAMPTONSHIREA43 Abthorpe Roundabout


June 2018




Project: Rail Central, NorthamptonshireA43 Abthorpe Roundabout





Status: Final v1.1

Authorised by: WP




CONTENTS

1 Introduction ................................................................................................. 1




Appendices




1 INTRODUCTION


the A43 Abthorpe Roundabout associated with the proposed Rail Central Strategic Rail

Freight Interchange (SRFI), in Northamptonshire, at the request of Martin Seldon, the




as follows:


Steve GilesBEng (Hons), IEng, FIHE, MCIHT, MICE, CMILT, MSoRSA, HE Cert Comp.Gateway TSP

1.3 The scheme is to provide improvements to the A43 Abthorpe Roundabout to improve

junction capacity such that it mitigates the impact of the proposed Rail Central

Strategic Rail Freight Interchange (SRFI) development. The scheme will comprise the

following:

i) provision of an additional lane on the A43 north approach;

ii) realignment of the existing lanes on the Brackley Road approach;

iii) realignment of the A43 exit; and

iv) reconfiguration of the road markings on the circulatory carriageway.

1.4 This Road Safety Audit took place at the Guildford office of Gateway TSP on 6th and





and 13.00 hours, when the weather was fine, and the road surface dry. Traffic flows

were constant.



1.5 Colin Bancroft of Highways England Area 7 Road Safety Team also attended the site

visit as an observer.








design check.












1211-80 EL15 - tpa A43 Abthorpe Roundabout – ExistingLayout

1211-80 PL15 E tpa A43 Abthorpe Roundabout – PotentialImprovements



· Personal Injury Collision Records

· MCC Survey Data with Queues Forecast Traffic Flows

· J15 Technical Note






General Matters


Local Alignment

3.2 Problem

HGVs overhanging adjacent lanes may lead to side swipe collisions.

Location: throughout the scheme

HGV movements were observed during the site visit and were seen to encroach on

adjacent traffic lanes. Where the lane widths and circulatory carriageway are being

altered it is not clear how the HGVs will navigate the new alignments. This could lead

to side swipe collisions.

Recommendation

Swept path analysis should be carried out for HGV movements throughout the scheme

and, if necessary, adjustments made to the layout.

Junctions



3.4 Problem

Proximity of shared surface to street furniture may lead to pedestrian/ cycle

collisions.

Location: Brackley Road westbound, shared surface

It is proposed to realign the traffic lanes on Brackley Road approaching the

roundabout. This would narrow the shared surface adjacent to some large cabinets

and a mast, which may lead to pedestrian and cycle collisions.



Recommendation

Sufficient lateral clearance should be provided for users of the shared facility when

passing the cabinets and mast.


3.5 The Audit Team raises no concerns at this Stage 1 RSA in respect of road signs,

carriageway markings and lighting.





document HD 19/15.

Audit Team Leader


Signed




Signed:


Audit Observer


3.4

Problem 3.2Throughout Scheme


RSA Reference: WP/SG/1805025 RSA1-15v1.1 June 2018

Rail Central, Northamptonshire – A43 Abthorpe Roundabout


3.2 Agreed. Swept path analysis for HGVs will be carried out on the proposed junction as part of the ongoing detailed design work and adjustments made to the layout, if necessary.

3.4 Agreed. Physical works to this approach are no longer being proposed.

END




APPENDIX I.4 Northampton RoadFoot/Cycleway RSA 1 and Designer’s Response


RAIL CENTRAL, NORTHAMPTONSHIRENorthampton Road/ Towcester Road Footway/ Cycleway

Stage 1 Road Safety AuditRequested by Transport Planning Associateson behalf of Northamptonshire County Council

June 2018




Project: Rail Central, NorthamptonshireNorthampton Road/ Towcester Road Footway/ Cycleway

Client: Transport Planning Associateson behalf of Northamptonshire County Council




Status: Final v1.1

Authorised by: WP




CONTENTS

1 Introduction ................................................................................................. 1




Appendices




1 INTRODUCTION

1.1 This report describes a Stage 1 Road Safety Audit (RSA) of a proposed footway/

cycleway on Northampton Road/ Towcester Road associated with the proposed Rail

Central Strategic Rail Freight Interchange (SRFI), in Northamptonshire, at the request

of Rob Sim-Jones, the Northamptonshire County Council (NCC) Project Sponsor.


membership approved by Rob Sim-Jones, the NCC Project Sponsor, was as follows:


Steve GilesBEng (Hons),IEng, FIHE, MCIHT, MICE, CMILT, MSoRSA, HE Cert Comp.Gateway TSP

1.3 The scheme is to provide improvements to the Towcester Road Footway / Cycleway

associated with the proposed Rail Central Strategic Rail Freight Interchange (SRFI)

development. The purpose of the improvements is to improve capacity, safety and

comfort for users such that it encourages the use of the footway/cycleway and

reduces the number of vehicles associated with Rail Central at this location. The

scheme will comprise the following:

i) widening of the existing footway including narrowing (in some areas) of the

carriageway; and

ii) realigning of Towcester Road at a number of locations.

1.4 This Road Safety Audit took place at the Guildford office of Gateway-TSP on 6th and





and 14.30 hours, when the weather was fine, and the road surface dry. Traffic flows

were light.










design check.












1211-80_Figure6.6-B

- tpa Proposed Footway/Cycleway AlongTowcester Road/Northampton Road



· Personal Injury Accident Records

· Pedestrian and Cyclist Accessibility Technical Note






General Matters


Local Alignment

3.2 The Audit Team raises no concerns at this Stage 1 RSA in respect of local alignment.

Junctions



3.4 Problem

Cyclists may fall onto the M1 below.

Location: M1 overbridge

The proposed shared facility crosses the M1 overbridge. The height of the existing

parapet adjacent to the facility is unknown but should a cyclist be involved in a

collision or lose their balance they may fall over the parapet onto the M1 below.

Recommendation

The height of the parapet should be checked and, if necessary, increased in

accordance with current guidance.


3.5 The Audit Team raises no concerns at this Stage 1 RSA in respect of road signs,

carriageway markings and lighting.





document HD 19/15.

Audit Team Leader


Signed




Signed:



RSA Reference: WP/SG/180525 RSA1-15v1.1 June 2018

Rail Central, Northamptonshire – Northampton Road / Towcester Road

3.4 Agreed. The height of the parapet is currently 1.2 metres and, will be increased to 1.4 metres in accordance with current guidance (4.23 TD19/06: Requirement for Road Restraint Systems (for Trunk Roads and Motorways), subject to structural assessments of the bridge.

END

S. Boland Desig Date: 17 August 2018

appendix i stage 1 road safety audits and designers’ responses · mciht, msorsa, he cert comp....

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