Clearbox Forecast Group specializes in teaming with other consulting firms
in order to compliment their project teams with additional travel demand
modeling and traffic forecasting expertise. Current and past clients include:
AECOM, Atkins Global, Bihl Engineering, Calyx, Mott MacDonald, HNTB, Kimley-Horn and Associates, Patriot Engineering, RSG, RS&H, WSP, and SEPI Engineering.
Clearbox Forecast Group, PLLC
Craig Gresham, President of Clearbox Forecast Group, has experience in travel demand modeling, traffic forecasting and GIS. His service both in the public and private sector has led him to develop a vision for state-of-the-art travel demand model products that are developed for practical, everyday use.
Craig has over 20 years of experience as a transportation engineer, travel demand modeler and traffic forecaster
Served for three years with the North Carolina DOT Transportation Planning Branch, two years of which were spent developing the Triangle Regional Travel Demand Model, North Carolina’s first fully multimodal travel model
Specializes in model development, subarea analysis, multimodal analysis, time-of-day analysis, and transit modeling
Has had major role in development of over numerous travel demand models, including models for the Triad (Greensboro-Winston Salem-High Point) Region, Triangle (Raleigh-Durham-Chapel Hill) Region, Metrolina (Charlotte) Regional Model, Memphis Model, BCDCOG (Charleston) Model, Leesburg VA, Greenville SC, Greenville NC, Rocky Mount, FAMPO (Fayetteville NC), Goldsboro, Jacksonville NC, and Hickory NC.
Piedmont-Triad Advanced Freight Model Development
Piedmont-Triad, NC Project Manager
Clearbox Forecast Group led a project team that is developed an advanced freight travel demand model for the Triad region. The freight model incorporates socioeconomic and commodity flow data to estimate truck tours (freight and commercial/delivery) for the area. The new model allows for much more advanced freight planning an analysis than is possible with the existing freight model.
I-2513 Traffic Forecasting
Asheville, NC Travel Demand Modeler/Traffic Forecaster
As a subconsultant to AECOM, Craig provided travel demand modeling and traffic forecasting services to evaluate the construction of project alternatives connecting I-240 and I-26/US 19/23 in Asheville.
I-485 Express Lanes (I-5507) Traffic Forecasting
Charlotte, NC Travel Demand Modeler/Traffic Forecaster
As a subconsultant to RS&H, Clearbox Forecast Group provided travel demand modeling and traffic forecasting services to evaluate the construction of two express lanes along I-485 between I-77 and US 74 (Independence Boulevard) in Mecklenburg County. Services included the preparation and analysis of eight Build Alternatives/Scenarios for the proposed project using the Metrolina Regional Travel Demand Model. A standard traffic forecast to NCDOT Transportation Planning Branch Standards was prepared as part of the project.
New Bern Socioeconomic Data Forecasting
New Bern, NC Travel Demand Modeler
Craig prepared new socioeconomic data forecasts for use in the newly developed New Bern Travel Demand Model. Project tasks included establishing county and model level control totals, meeting with a land use forecasting committee, and create a TAZ level forecast for housing and employment for use in the model for 2020, 2030, and 2040 future years.
PTRM Travel Demand Model Update
Piedmont-Triad Region, NC Project Manager, Travel Demand Modeler
Craig led a project team for the update and development of the PTRMv4 model. Efforts included review of input model data such as socioeconomic data and networks, development of expanded external station data, and re-calibration of the commercial vehicle model and external-internal trip distribution model. The project team worked closely together to develop updated parameters for trip generation, distribution, mode choice and assignment. As part of the project Craig and the project team also implemented modifications to the model interface to improve model stability and usability.
FS-1205A , I-40/I-440 Managed Lanes
Orange, Durham, Wake, Johnston Counties, NC Travel Demand Modeler/Traffic Forecaster
As a subconsultant to Kimley-Horn, Craig provided model coding, analysis and support to prepare traffic forecasts for FS-1205A, I-5111, and I-5338 using the latest Triangle Regional Model (TRMv5). A total of 24 alternatives were coded to assess the impacts of various lane configurations, including managed lanes with direct access interchanges. Output from these alternatives was used to prepare formal traffic forecasts for NCDOT Transportation Planning Branch.
HOV/Toll Modeling Analysis (Ongoing)
Triangle Regional Travel Demand Model Raleigh, NC Travel Demand Modeler
As a subconsultant to HNTB, Craig is providing model analysis and support for the North Carolina Toll Authority using both the v4 and v5 of the Triangle Regional Model. Numerous alternatives were coded and analyzed for the Complete 540 project. In addition, Craig aided in the development of the socio-economic data. Toll diversion analysis was performed. And lastly, a sophisticated turn-reporting system was developed and automated to report turning movements for numerous intersections.
North Carolina Statewide Travel Demand Model
Raleigh, NC Travel Demand Modeling
As a subconsultant to PB Americas, Inc, Clearbox Forecast Group provided technical assistance in Phases 1-4 of a study to develop a statewide TransCAD travel demand model for North Carolina. Tasks included development of TransCAD model interface (GISDK), review of MPO models within the State to evaluate model attributes, development of network structure in TransCAD, development of SE data and TAZ structure in TransCAD, and assistance in technical review of model components.
Johnson Street/Sandy Ridge Road Widening (U-4758) Traffic Forecasting
High Point, NC Traffic Forecasting (2013)
As a subconsultant to Atkins Global, Clearbox Forecast Group provided turn-key traffic forecasting services for U-4758. This project included collection of traffic data, preparation and analysis of build scenarios using the PTRM Travel Demand Model, preparation of base year and future year traffic estimates for build and no-build scenarios, and preparation of a section for the purpose and need document for NEPA documentation.
Rocky Mount Travel Demand Model Update
Rocky Mount, NC Travel Demand Modeler
Clearbox updated the Rocky Mount Travel Demand Model (TransCAD) to the 2010 base year using new Census and Employment data. The project also entailed training and leading the staff through various development exercises so that data was developed internally. Craig also created documentation for each individual step which served as analysis exercises. Lastly, the interface/GISDK scripting for new base and future years was updated.
Business I-40 Reconstruction Study
Winston-Salem, NC Travel Demand Modeling (2013)
As a subconsultant to RS&H, Clearbox Forecast Group supported scenario planning efforts by using the Triad Regional Model to test alternative transportation scenarios to determine the impact to travel patterns along I-40 Business in the vicinity of potential interchange reconfigurations between Broad Street and Main Street in Winston Salem, NC.
Triad External Station Survey Study
Piedmont-Triad, NC Travel Survey Analysis (2010)
Clearbox assisted Kimley-Horn and ETC Institute in designing and administering an external station cordon survey for the Piedmont Authority for Regional Transportation (PART). Approximately twenty locations were surveyed at locations surrounding the Greensboro-Winston Salem-High Point-Burlington metropolitan area. Craig was responsible for review of project planning documents, review of survey instruments and traffic control procedures, assistance with surveys in the field, and technical support of documentation and data analysis.
FS-1205A , I-40/I-440 Managed Lanes
Orange, Durham, Wake, Johnston Counties, NC Travel Demand Modeling/Traffic Forecasting
As a subconsultant to Kimley-Horn, Craig is providing model coding, analysis and support to prepare traffic forecasts for FS-1205A, I-5111, and I-5338 using the latest Triangle Regional TransCAD Model (TRMv5). A total of 24 alternatives are being coded to assess the impacts of various lane configurations, including managed lanes with direct access interchanges. Output from these alternatives is being used to prepare formal traffic forecasts for NCDOT Transportation Planning Branch.
HOV/Toll Modeling Analysis, Triangle Regional Travel Demand Model (Ongoing)
Raleigh, NC Travel Demand Modeling
As a subconsultant to HNTB, Clearbox Forecast Group is providing model analysis and support for the North Carolina Toll Authority using both the v4 and v5 of the Triangle Regional Model. Numerous alternatives were coded and analyzed. In addition, Clearbox aided in the development of the socio-economic data. Toll diversion analysis was performed. And lastly, a sophisticated turn-reporting system was developed and automated to report turning movements for numerous intersections. Work is continuing with analysis of toll sensitivity in the model, travel time analysis, follow-up alternatives analysis, and coordination with ITRE, NCDOT, CAMPO and other stakeholders.
I3311-C I-77/I-277 HOT Lanes
Charlotte, NC Travel Demand Modeling/Traffic Forecasting (2012)
As a subconsultant to Kimley-Horn and Associates, Inc, Craig provided travel demand modeling analysis for HOT Lanes on I-77 and I-277 in the Charlotte region using the Metrolina Regional Model (TransCAD). Alternatives include variations on HOV/HOT configurations and testing of alternative pricing schemes.