This document discusses improvements that could be made to signage and traffic calming measures in a 20mph zone in Chapel Allerton, Leeds. It finds that some signs are too high and difficult to read. It also finds that the spacing between traffic calming measures on some roads does not meet legal requirements, making the 20mph limit not self-enforcing. It provides data on distances between speed bumps and other traffic calming features on various roads within the zone. The document concludes that the current scheme is not in compliance with traffic regulations and is therefore illegal.