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The research aim is to develop the 3DCAD and 4DCAD models, based on BIM technology, for project planning and budgeting of the new urban infrastructures of the Phitsanulok Central Park in Thailand to achieve the goal of establishment of “Phitsanulok Green and Healthy City”. This newly project was proposed by the Phitsanulok City Municipality and designed by Naresuan University team. The traditional 2D drawing format and specifications were delivered for procurement process. Then 3DCAD model was developed based on 2D drawings with Microstation based software. The 15 months original construction schedule was developed as an initial plan with the 120 million Baht estimated cost. Moreover, 4DCAD model was developed with the AECO Sim Building Designer, a linkage of simulation model between 3DCAD model and construction schedule, to simulate the what-if scenario of the proposed construction plan. According to limitation of government’s budget, project allocation of financial budget became an important constraint. Therefore, the initial plan was revised into the phases based on the approved and proposed budgets for the future to complete the project as an alternative schedule. Finally, the related 4DCAD models were developed in order to satisfy the project participants and improved the project more understandable. Key-words: 4DCAD, Building Information Modeling (BIM), Project Planning and Budgeting, Urban Infrastructure.

The 4DCAD in Project Planning and Budgeting of the New Urban Infrastructure for the Phitsanulok Central Park, Thailand