Over a nine year period, WATT Consulting Group worked closely with the City of Langford to construct a second interchange to service the community. Since becoming a municipality in the early 1990s, the City of Langford has been one of the fastest growing municipalities in Canada at near 5% growth per year for the last decade. With significant residential and commercial growth in Langford over this time period, there was significant demand for another interchange to newly zone areas on the north side of the Highway (Bear Mountain and Skirt Mountain Developments) and the south side (Westhills and City Centre Recreational area).
WATT’s role on this project was two-fold: [a] we worked with long term modelling projects to confirm the demand for the interchange; [b] we worked with civil designers to identify the type of interchange (tight diamond versus parco), the location based on existing and future developments, and the need for a third interchange in the longer term.
Following confirmation of the interchange location with the civil designers, City staff, and Ministry of Transportation and Infrastructure, the requirements for the selected tight diamond design were finalized including the ramp laning, number of lanes on the bridge deck, and traffic control at the two intersection at the interchange as well as the new frontage road and new connection to Goldstream Avenue.
During the detailed design stages of the interchange, we were the engineer of record for the signage and pavement marking plans. We also provided the traffic engineering checklists and signal timing sheets. We prepared the traffic management plans for the majority of the stages of work on the interchange as well as participated in the Phase 1B safety audit.