Traffic Forecasting at NCDOT
Transcript of Traffic Forecasting at NCDOT
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Traffic Forecasting at NCDOT
Brian Wert, P.E. Systems and Planning Unit Head
NCDOT Pre-Construction WorkshopMay 8-9, 2018
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Forecast Completion DurationForecasts can be time consuming because:• Traffic data collection can take significant
time and be delayed for various reasons• Coordination with local communities requires
significant back and forth• Consistency with other forecasts can require
coordination amongst multiple teams
Traffic Forecasting
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Forecast Completion Duration
Forecasts require some work to be done in series.• Future year forecasts can’t be completed
without base year volumes• Base year volumes can’t be finalized until
data collection is complete• Growth projections can’t be verified until
coordination with locals is done
Traffic Forecasting
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Forecast Completion DurationForecasts are a precursor for a number of tasks.• Congestion management utilizes forecast
data to analyze alternatives• Design makes changes based off of
congestion management results• Pavement design, noise, and others also
use forecast data to complete tasks.
Traffic Forecasting
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Forecast InitiationForecasts must be initiated ASAP because:• Forecasts take time to complete• Forecast steps can’t always be done in
parallel• Forecasts support many following steps
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Proactive Forecasting
• Forecasts take time and feed numerous analyses
• To assist project development we have shifted to a proactive forecasting approach
• Proactive forecasting aims to have a forecast completed before NEPA/SEPA work begins
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What a Proactive Forecast IncludesFor CE’s and EA’s• Base Year No-Build• Future Year No-Build and Build TIP Scenario• Base year build, interim years, and additional
build scenarios can be added if needed
For EIS’s• Base Year No-Build• Future Year No-Build• Build scenarios can be completed during initial
phase or at a later date (Post CP1/CP2)
Traffic Forecasting
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Benefits of Proactive Forecasting
• Project timelines less likely to be interrupted due to forecast difficulties or data collection delays
• Data collection that can assist other tasks is done earlier
• Using TPD for forecast development means forecast is ready before project development begins
Traffic Forecasting
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How to Request a Proactive Forecast
• We have been in communication with every division and will continue to communicate
• Send requests to [email protected]• Reach out to me (Brian Wert) or State Traffic
Forecast Engineer (Keith Dixon)• Include TIP Number and WBS number and
Requested Delivery Date/Priority
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How to Request a Proactive Forecast
In the future include schedules in STaRS• Allows us to query all schedules at once• More efficient way for us to schedule and
prioritize work• Eliminate additional step for project
managers• Seen as a way to greatly improve efficiency
going forward• Not fully ready for implementation
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Parting ThoughtWhen all else fails:
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NCDOT TPD Contacts
• NCDOT Systems and Planning Unit Head:Brian Wert, PE, [email protected], 919-707-0974
• State Traffic Forecast Engineer:Keith Dixon, [email protected], 919-707-0984
Traffic Forecasting