Star Rating for Designs (SR4D) is a free tool and evidence-based programme of applications informed by the iRAP Methodology which enable the simple and objective measure, and improvement, of the level of road safety ‘built in’ to a road design for vehicle occupants, motorcyclists, pedestrians and cyclists, before the commencement of civil works.

SR4D enables road engineers and designers, municipalities and road authorities, funding agencies and governments to make roads safer.

Ensuring the safety of a road design before it clears the design phase directly equates to lives and serious injuries saved on the street. Despite knowledge and free tools to improve design safety, unsafe 1- and 2-star roads are still being built.

SR4D strengthens the road safety audit process, complementing it with an objective and repeatable qualification of road user risk (without the need for a high level of experience), and supports the wider potential of Star Ratings as a safety performance metric and maximised safety in road infrastructure investment.

SR4D will be essential to supporting countries to achieve the United Nations Global Road Safety Performance Targets, especially Target 3 to ensure all new roads are built to a 3-star or better standard for all road users.

Find out more information on SR4D and how to use it below.

Watch a short SR4D demonstration

How does SR4D work?

Access SR4S Web Tool

Building Organisational Capacity

SR4D Training

Including SR4D in the tender process

Frequently Asked Questions

  • FAQ's coming soon

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Star Rating for Designs has been made possible through the financial support of the Global Road Safety Facility.

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