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Designing for sustainable urban travel.

Established in 2017, City Infinity is a micro highway engineering consultancy which can help you design for sustainable urban travel.

We specialise in advising on street retrofits and new build layouts which enable walking and cycling as well as undertaking street audits and providing walking and cycling design advice. We are also able to offer design review services and training in street design matters.

For more information or a discussion, please contact us.


Mark Philpotts  


Mark is our Founder and Chief Engineer with over 25 years of civil engineering experience.

He has worked in areas as diverse as bridge management, development management, utility installation, traffic engineering, highway engineering, highways maintenance and engineering consulting. However, sustainable travel has always been the area of work within which he has been the most happy; especially those small-scale, local schemes which can make a big difference.

He has extensive experience in project delivery and has been responsible for managing multi-million pound investment programmes. At the other end of the scale, he has an almost fanatical interest in design detail and how street features fit together, as it can often make the difference between a good and a great scheme; it’s also key to ensuring designs are accessible and inclusive.

Mark believes in the power of designers experiencing the infrastructure they design and he has perhaps taken this to the extreme in acquiring a Christiania cargotrike which has taught him for more about the stability and dynamic envelope of non-standard cycles than could ever be gleaned from a design guide! He is also a member of the Beyond the Bicycle Coalition which provides real insight into inclusive cycling.

As well as releasing design guidance through City Infinity, Mark was also the principal author for CIHT’s Designing for Walking and so is one of the UK’s leading experts on the subject. Most recently, he was appointed as a Design Council Expert.