Transport Planning & RSA Consultant

Road Safety Audits Ltd

07954 440676

info@roadsafetyauditsltd.co.uk

Planning Approval Support

Pre-commencement Condition Carriageway Surveys

As part of the development pre-commencement conditions relating to larger planning approvals, the Planning Authority sometimes require a survey of the existing adopted carriageway leading up to the development.

Pre commencement Survey 2

A Typical Planning Condition

Before development commences, a survey of the existing condition of the highway will be submitted and approved in writing by the Local Planning Authority. The survey shall include carriageway and footway surfacing, verges, kerbs, edgings, street lighting, signing and white lining.

Upon completion of the development and before any new building is occupied, a highway condition survey identifying a scheme to reinstate any subsequent defects in the condition of the highway on (name of road) shall be submitted to and approved in writing by the Local Planning Authority. All of the identified works shall be implemented before any part of the development is first brought into use.

The purpose of this condition survey is to ensure any defects in relation to the carriageway are recorded and agreed prior to construction traffic commencing. It protects both the Highway Authority and also the developer from protracted negotiations and sometimes expensive repairs at a later date.

Types of Road Defect

Here are some common road defects with pictures and key details for identification and maintenance.

Alligator Cracking

Alligator Cracking

Interconnected cracks forming a pattern similar to alligator skin.

Causes: Fatigue of pavement, repeated traffic loading, weak base/subgrade.

Severity: High

Maintenance: Mill and overlay or reconstruct the affected area.

Block Cracking

Block Cracking

Large, rectangular cracks that divide the pavement into blocks.

Causes: Shrinkage of asphalt, temperature changes, ageing of pavement.

Severity: Medium

Maintenance: Seal cracks; apply overlay if required.

Longitudinal Cracking

Longitudinal Cracking

Cracks that run parallel to the centerline of the road.

Causes: Poor joint construction, shrinkage, reflective cracks from below layers.

Severity: Low to Medium

Maintenance: Seal cracks, route sealing, or fill cracks.

Transverse Cracking

Transverse Cracking

Cracks that run across the pavement at right angles to the centerline.

Causes: Temperature changes, shrinkage of asphalt, reflective cracking.

Severity: Low to Medium

Maintenance: Seal cracks; overlay if severe.

Rutting

Rutting

Longitudinal depressions in the wheel paths.

Causes: Permanent deformation of pavement layers due to heavy traffic.

Severity: High

Maintenance: Mill and overlay or full depth repair.

Potholes

Potholes

Bowl-shaped holes in the pavement surface.

Causes: Moisture infiltration, traffic load, poor drainage, aging.

Severity: High

Maintenance: Patch repair or full depth repair.

Raveling

Raveling

Surface wear causing aggregates to loosen and dislodge.

Causes: Loss of binder, poor quality materials, aging, traffic.

Severity: Low to Medium

Maintenance: Seal coat or surface dressing; overlay if severe.

Bleeding

Bleeding

Excess bitumen rising to the surface, making it shiny and slippery.

Causes: Excess binder, high temperature, over-rolling.

Severity: Medium

Maintenance: Sand patching, surface treatment.

Shoving

Shoving

Displacement of pavement material causing ridges along the surface.

Causes: Instability of mix, high traffic, poor compaction.

Severity: Medium

Maintenance: Remove displaced material, repave.

Edge Break

Edge Break

Breakdown of the pavement edge.

Causes: Weak support, poor drainage, traffic load on edge.

Severity: Medium

Maintenance: Edge repair, shoulder strengthening.

Joint Reflection Cracking

Joint Reflection Cracking

Cracks that occur over construction joints and reflect to the surface.

Causes: Movement of joints, temperature changes.

Severity: Low to Medium.

Maintenance: Seal cracks; overlay if required.

Patch Deterioration

Patch Deterioration

Deterioration of previously patched areas.

Causes: Poor patch material, inadequate compaction, traffic load.

Severity: Medium to High

Maintenance: Remove and repatch properly.