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:

Advice on Site Drainage

Wed 22 June 2016

We consulted Sanderson Associates with regard to a surface water drainage design issue that we had recently. They were prompt in their response to us and were able to cut right through to the heart of the problem and provide advice that was direct and uncomplicated. The information provided satisfied the requirements of the local […]

Highway Advice – Testimonial

Mon 9 May 2016

Bob came to the island as an, ‘expert witness’, in a Planning Appeal, for a sizeable property build, essentially covering the Highway issues. After meeting Bob the day before the Appeal, it was abundantly clear this chap, ‘knew his stuff’. His consummate professionalism, experience and knowledge came though at the Hearing, contributing to the process […]

Transport Report in Opposition to Proposed Large Scale Housing

Tue 5 April 2016

We commissioned a Transport Report from Sanderson’s in opposition to a proposed large scale housing development near us. Ian Ladbrooke provided professional expertise in identifying the transport issues and the flaws in the developer’s transport assessment. His input proved invaluable and ultimately the application was refused on transport grounds. The report was delivered on time […]

Swept Path Analysis, Proposed Extension to Industrial Development

Mon 7 December 2015

As an independent property developer I was asked for a swept path analysis to aid my planning application. I googled and found Sanderson Associates, never had I heard of them before. I have to say from the start they were extremely professional and very prompt. I asked for many amendments on my analysis at the […]

Residential Development and Agricultural Access

Wed 16 September 2015

In my work as a planning consultant, I have come across a number of intransigent highway officers. Engaging Sandersons has allowed me to overcome these problems and secure planning consent for some difficult sites. They offer efficient and professional service which I can thoroughly recommend. Adrian Rose, Rose Consulting

Swept Path Analysis – Residential Development

Wed 5 August 2015

 Many thanks for the final swept path analysis drawings. Can I also say that its been a pleasure, and we will definitely use your services again on future projects. Richard On behalf of C E Gilbert & Son Developments Ltd

Swept Path Analysis

Mon 27 July 2015

We are a small civil engineering consultancy mainly involved in the design of housing developments. We often require swept-path analysis in order to satisfy local councils that their vehicles will be able to access the development. We send our site plans to Darren at Sanderson Associates who always provides a fast, efficient and consistent service. […]

Planning Appeal Rebuttal, Proposed Residential Property

Mon 13 July 2015

 We initially engaged Sanderson’s to carry out a traffic survey to support a planning application. They were recommended by our architect and their quote was very reasonable compared with other survey companies that we approached. Unfortunately, the initial survey was sabotaged when the monitoring tubes were pulled up by an unknown third party. Sanderson’s recommended […]

Flood Risk Assessment, Residential Development

Mon 15 June 2015

Sanderson Associates has provided us with a very professional service, and has always responded extremely quickly and efficiently to our client’s requirements. Laura Elias, Assistant Planner, CBRE Ltd

CPD Seminar Highway Development Control and Flood Risk

Tue 31 March 2015

I would like to thank the Team at Sandersons for providing CPD Seminars on Highway Development Control and Flood Risk to our Chartered Surveyors. The content of each meeting was both relevant and informative and gave useful, practical guidance on each topic. It is clear that Sandersons have a wealth of knowledge and expertise in […]

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