Landscape and urban design company TEP is responsible for the design and planning of the project and has also been appointed to oversee the works.
The Roman Gateway project aims to establish Carlisle as a tourist destination and the gateway to Hadrian's Wall. Improvements include new pathways and street furniture, sandstone and wooden way markers, information boards and public art installations.
TEP senior landscape architect Narada Haralambous said the project would help to revive the city. "It is part of a wider goal to regenerate the city's historic quarter and make Carlisle a world-class destination," he added.
Finance was provided from the North West European Regional Development Fund, the Northwest Regional Development Agency and Carlisle City Council. It is expected to be complete by March.