The Grattan Street corridor, located in Carlton on Melbourne’s CBD fringe, was subject to significant change as part of the Metro Tunnel Project (MTP), which includes a new train station and an upgrade of Grattan Street between Flemington Road and Bouverie Street.

Using the MTP as a catalyst, the City of Melbourne (CoM) had an opportunity to improve public amenity, prioritise active transport, and establish innovative spaces along the full length of Grattan Street whilst tying into the MTP works area.

To achieve this, several transport modal filter options were proposed to filter out through vehicles travelling along Grattan Street whilst maintaining access for cyclists, pedestrians, and public transport.

BG&E delivered the following key scope items associated with the project

• Review of background documentation, including CoM transport plans and strategies, MTP design drawings and documentation, existing traffic counts, CoM urban design plans, and a CoM opportunities plan.
• Procurement of traffic surveys for the entire Grattan Street corridor.
• Preparation of modal filter options and scenarios for input into traffic modelling.
• Managing a subconsultant to undertake
• DOMINO (VISUM) modelling of proposed options and scenarios.
• BG&E used modelling outputs to identify and quantify traffic redistribution within the surrounding area, viable detour routes, volume and capacity assessments of the surrounding road network based on modelled options, and travel time impacts based on model determined origin-destinations.
• SIDRA modelling of intersections along the Grattan Street corridor, using the DOMINO modelling results and traffic surveys as input to quantify anticipated intersection impacts of the proposed options/scenarios.
• Presentation of the modelling process in a technical traffic report including key findings.
• Presentation of findings to Council and the Department of Transport and Planning.