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Metro DTA Workshop: August 15 th, 2012 Road Diet DTA Methodology PM 5-hr trip tables (2pm-7pm) were transposed to represent reverse directionality on network.

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Presentation on theme: "Metro DTA Workshop: August 15 th, 2012 Road Diet DTA Methodology PM 5-hr trip tables (2pm-7pm) were transposed to represent reverse directionality on network."— Presentation transcript:

1 Metro DTA Workshop: August 15 th, 2012 Road Diet DTA Methodology PM 5-hr trip tables (2pm-7pm) were transposed to represent reverse directionality on network (akin to AM assignment) Technical team (CoP, Metro, ODOT, DKS) worked together to evaluate possible reduction of trip tables to match AM profile 5% reduction in transposed PM trip tables recommended Calibration measurements (volumes vs. counts on Barbur) show that 100% transposed trip tables better match against counts than 95% trip tables Used 100% transposed trip tables 2010 existing conditions and 2035 future conditions studied All results represent transposed PM trip tables AM directionality 1

2 Metro DTA Workshop: August 15 th, 2012 Road Diet DTA Caveats This model used 2010 Base and 2035 Low Build trip tables for all Road Diet model runs Does not account for following: Time-of-day shifts Trip shift (e.g., not taking discretionary trips) Mode shift (e.g., transit, non-motorized) Signals not re-optimized for Road Diet…no additional mitigation for traffic impacts Transposed PM trip tables not a perfect correlation to AM trip tables 2

3 Metro DTA Workshop: August 15 th, Peaking profile


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