Modeling Benefits for Transportation Projects

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Introduction

While a typical building project is limited by its footprint and size, a transportation project such as a highway is mainly a linear project which comprises of many repetitive and similar elements. A highway interchange project is less spread than a long and large straight road, but is more complex. Projects involving reconstructing or expanding existing highways are sensitive and traffic has to be managed so that the impact is as limited as possible. Construction process has to be done while minimizing public inconvenience, hence the need to plan as many details about sequencing as possible, increasing project complexity. Moreover, transportation projects are always characterized by right-of-way acquisition, a sensitive process that determines the beginning of construction. Another important challenge when dealing with a transportation project is relocation of utilities to avoid any conflicts. As a result, there are many challenges in transportation projects: design complexity, traffic control management, right-of-way acquisition, utility relocations, and also delivering projects on time and within budget.

Departments of Transportation, A&E firms, contractors and other transportation-oriented organizations need to respond to those challenges as effectively as possible. They want to avoid delay and cost overrun and come up with a successful project. They express a need for biddable and buildable projects with the smallest number of change orders and litigation [word ] as possible (Mc Manus et al 1996) [1]. Constructability reviews are essential processes that can be implemented to make sure those challenges are addressed in a satisfying way. They identify potential planning and design flaws that may impact proje...

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... model” Structural Engineering World Wide, T191-1 (CD ROM Proceedings), Elsevier Science Lt

[4] Gao, J., Fischer, M., (2008). “Framework and Case Studies Comparing Implementations and Impacts of 3D/4D CAD Modeling across projects”, CIFE Technical report.

[5] Staub-French, S., Russell, A., Tran, N., (2008). “Linear scheduling and 4D Visualization”, Journal of Computing in Civil Engineering, pp. 192-205.

[6] Chevallier, N., Russell, A.D., (1998). “Automated schedule generation”. Canadian Journal for Civil Engineering, 25(6), 1059–77.

[7] Koo, B., Fischer, M., (2000). “Feasibility study of 4D CAD in commercial construction”, Journal of Construction Engineering and Management, Vol 126, No4, pp. 251-260.

[8] Staub-French, S., Khanzode, A., (2007). “3D and 4D modeling for design and construction coordination: issues and lessons learned”, ITcon Vol. 12, pp.381-407.

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