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Property developer, Rightacres, needed a modern transport hub connecting bus, rail, and active travel networks, with a focus on sustainability through innovative drainage and green infrastructure. The project aimed to create a vibrant public space that supports local businesses, drives economic growth, and adapts to future transport and city needs.

Arup played a key role in transforming Cardiff Central Square and The Interchange, delivering integrated transport solutions and sustainable design. These improved connectivity between bus and rail services, implemented innovative drainage systems, and enhanced biodiversity. Arup also revitalised public spaces, ensuring a future-proof infrastructure that supports economic growth and adapts to evolving city needs. 

This project enhances Cardiff’s connectivity, sustainability, and economic growth by creating a more efficient transport network and dynamic public space. Smart infrastructure and green design improve travel, manage flooding, and support biodiversity. Future-proofed and adaptable, it strengthens Cardiff’s role as a regional hub, fostering long-term resilience and economic opportunity.

Accessible and efficient transport design

Arup provided comprehensive design and engineering services for the transformation of Cardiff Central Square and The Interchange. Our expertise in transport infrastructure played a key role in creating a seamless connection between bus and rail services, enhancing accessibility and efficiency for commuters. We also contributed to the integration of smart technologies and sustainable design, ensuring the transport hub met both current and future needs.

Paul McCarthy

Chief Executive, Rightacres

Innovative draining systems

In addition to transportation, our work focused on improving Cardiff’s public realm. We introduced innovative drainage systems, such as rain gardens and tree pits, to manage surface water and reduce flood risks, while boosting local biodiversity. The team’s holistic approach helped create a modern, vibrant public space that not only serves commuters but also contributes to the city’s economic growth and environmental resilience. Through this collaboration, Arup delivered a future-proof infrastructure solution that supports Cardiff’s long-term development and enhances the overall urban experience.