Highway Detailed Design

Sanderson Associates offer a full range of Highway Detailed Design Services from the design of a simple vehicle access for one dwelling to signalised junctions and re-routing of primary dual carriageways through City centres to serve major developments.  Our Clients range from private individuals through to all members of the Private Sector and a variety of Public Bodies.

The level of services we offer range from the provision of preliminary design advice, through the detailed design process to the preparation of construction drawings, construction documents, tender processes (including tender appraisal), pre- start meetings, project management, works on site supervision, agreeing final accounts, certificates of completion and the preparation of as built drawings.

Where there are on site highway works or, if the initial planning application's Transport Assessment has identified the need for off site highway improvements (or during the negotiation period these become a requirement of the Local Planning or Highway Authority), it is usual for us to examine these in enough detail to be able to advise our Clients on the likely cost implications and deliverability of the works. This is important not only for budget costs, which may impact on the viability of the project, but also if additional third party land is found to be needed through a requirement of the Authority which may seriously effect the delivery of the works or the overall project.

Design Standards

The design process is always carried out with close consultation with the Local Highway Authority to ensure that the designs are compliant with current design standards and are to the satisfaction of the appropriate body.  The design standards normally used are drawn from the ‘Design Manual for Roads and Bridges’ (DMRB), Manual for Streets, Manual for Streets 2: Wider Application of the Principles and local guides as adapted by the Local Highway Authority.  Close liaison can also be provided if required with the appointed contractors when works are under construction.

Construction Drawings

The level of detail required in the design of a scheme will depend on the scope and complexity of the project.  Detailed design drawings at 1:500/1:200 scale are typically provided and the following is a list of the most common drawings normally required.  The list is by no means exhaustive and additional drawings are quite often necessary dependant on the Local Authority and works being undertaken:

  • General Arrangement
  • Site Clearance
  • Fencing
  • Drainage Layout
  • Earthworks
  • Carriageway and footway construction details
  • Kerbing, edging and channel details
  • Traffic signs and road markings
  • Landscaping proposals
  • Street Lighting
  • Cross and Longitudinal Sections
  • Setting out details
  • Standard construction details
  • Utility Company Apparatus

Detailed Design

Sanderson Associates use the latest design tools and applications in the detailed design process including:

  • AutoCAD computer aided design software to produce the detailed design drawings
  • Key TERRA-FIRMA and PDS ground modelling software to prepare the horizontal and vertical design
  • AutoTrack for checking various vehicle swept paths for the proposed horizontal design
  • KeySIGNAL for the design of new traffic signal schemes
  • KeyLINES for the design of new road marking schemes
  • KeySIGN for the design of new traffic signs
  • KeyPOST for the design of new sign posts

Highway Agreements

When a development requires alterations or improvements to an existing public highway, for the works to be implemented the developer must first enter into an appropriate form of agreement with the Highway Authority.  These agreements are contained within the Highways Act 1980. 

Sanderson Associates have the experience and expertise to guide a developer through this process and coordinate with the Highway Authority on their behalf.  The most common agreements required for the completion of highway works are briefly explained below:

Section 278 Agreement - This agreement is appropriate when a development requires alterations to be made to the existing public highway and may require the developer to dedicate some of the development land as new public highway as part of the works. Examples of such works could be the construction of a new access/junction or improvements such as a new roundabout, additional traffic lanes etc to an existing access/junction.

Section 38 Agreement - This agreement is appropriate where new residential or industrial estate roads are to be constructed to adoptable standards and in the future are to be maintained by the Highway Authority as adopted public highway.

Section 184 Agreement - Primarily this agreement is for the formation of vehicle crossings over footways and verges for single dwellings or shared private drives. However, it is also common for Highway Authorities to use this agreement where a developer intends to construct or alter any site access or accesses where these are the only highway works required to serve the development. Examples of this would be improved bell mouth junctions or new heavy duty industrial types of access.
(Note – this agreement may not be necessary if the works are included within a Section 38 Agreement).

Section 50 License - Unless covered by any of the above agreements, excavations in the public highway for the purposes of laying new apparatus, connections to existing services, advance trial holes etc require the issue of a license by the Highway Authority under Section 50 of the New Roads and Street Works Act 1991.

Contract Documents

Where required, we will prepare contract documents and can tender works on behalf of Clients.  This includes preparation of highway contracts in accordance with the ‘NEC3 Engineering and Construction Contract’ suite of documents and the preparation of Specifications and Bill of Quantities in accordance with the ‘Manual of Contract Documents for Highway Works’ (MCDHW) or as amended by the Local Highway Authority.

Project Management and Supervision

We regularly provide project management and supervision roles on a variety of highway schemes. This includes managing the contractor on site and coordinating with the Client to ensure that the implementation of the highway works is completed as smoothly as possible and that the Client’s deadlines are achieved.

Require Highway Detailed Design Services?

We would be delighted to provide you with our competitive fee proposal to provide you with our Highway Detailed Design Services, please call us on 01924 844080 or click here to complete our secure online form.


What our Clients' say:

Transport Statement and Access Advice, Residential Development Circa 60 Dwellings – Testimonial

Fri 5 May 2017

During the course of the compiling the report for submission to planning I found Adam Darwin’s attitude and approach was very professional and supportive. We had several issues to resolve and I found him to respond very quickly and produce revised drawing for discussion with an excellent turnaround time. His phone manner and advice were […]

Flood Risk Assessment, Data Centre, Keighley

Wed 8 March 2017

Good communication and persistence coupled with a high level of professional expertise, has enabled what looked initially to be an insurmountable objection to be overcome. J O Steel, J O Steel Consulting, Bingley

Swept Path Analysis, New Build House, Testimonial

Wed 15 February 2017

Sandersons were appointed to conduct our swept path analysis study for a modern new build house in London. We found the service personable, attentive and thorough. Further, when confronted by a design problem, they were creative and positively contributed to its resolution. Ben Kirk, Associate, Edgley Design

Transport Statement – Proposed Residential Development, Shipley

Thu 8 December 2016

You were recommended to us for a housing site where you had previous experience of the neighbouring land. Every part of the experience was simple and positive and we have no problem recommending your services and consider you for further works. From us at Lumia Homes part of Incommunities Housing Association we would like to […]

Transport Statement, Proposed Residential Development, 6 Detached Dwellings

Wed 23 November 2016

Mr Greenwood is a highway wizard and worked his magic on the Hardingham scheme, without Sandersons input I am confident this scheme would have not passed… Henry Isotta-Day – Architectural Design Engineer, Clayland Architects

Flood Risk Assessment, Proposed Residential Development, Cobham, Surrey

Fri 28 October 2016

We were very pleased with the service received and the positive outcome for our client, and would not hesitate to recommend for flood risk assessments. Thanks very much for helping us with this project. Malcolm Jenkins, Architect, Malcom Jenkins Associates

Technical Letter in Support of Residential Development

Thu 28 July 2016

Recently worked with Robert in order to turn round a planning application which was being recommended for refusal due to Highways objections at the eleventh hour. On this one we had to really think out of the box quickly to mitigate the concerns. Robert was instrumental in coming up with options and innovative ideas and […]

Stage 3 Road Safety Audit

Mon 25 July 2016

The service provided was professional direct to the point and alternatives were provided on discussion of the reports requirements, a user friendly service in every way to a legacy job with very little background information. Thank you Steven Johnston – Keepmoat Regeneration Ltd

Flood Risk Assessment, Proposed Residential Development.

Fri 8 July 2016

Thank you for your assistance on the Flood Risk assessment in relation to our works being carried out at the house. I would like to add that I only called yesterday seeking advice on a flood risk assessment not knowing what it entails and you have acted extremely quickly. You listened and gave valuable, honest […]

Highways Advice, Proposed Residential Development, Micklepage Paddock

Wed 29 June 2016

I would just like to reiterate my thanks, together with those of my clients, for all the work that you did in assisting to obtain planning permission for the above project. Highways had always indicated that being able to provide adequate sight lines onto the main road would be a major factor in determining this […]

Highway Detailed Design, Detailed Design, Transport Assessment, Design Standards, Construction DrawingsDetailed Design, Highway Agreements, Section 278 Agreement, Section 38 Agreement Section 184 Agreement, Project Management and Supervision