Flow joined URS New Zealand Limited and Fulton Hogan in developing a design for the upgrade of the Lincoln Road interchange on the Northwestern Motorway. We used the SH18 Upper Harbour SATURN model, re-calibrated in the Lincoln Road area, to develop and assess future traffic demands and the design of the interchange. We also developed a PARAMICS model to better understand the inter-relationship of the motorway, the interchange, ramp metering and adjacent signalised intersection at Lincoln Road/Triangle Road, and the requirements for the design, including intersection signal design. We also developed the design for the motorway and interchange signage and reviewed the pavement markings design.
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