DCE were appointed by WhiteYoung Qatar to conduct a Traffic Impact Study (TIS) for Seef Lusail in Lusail, Qatar. The proposed development was a medical centre in Education City which encompassed world class patient care, medi-cal education and biomedical research. Due to the central location of the development within Education City, a large study area was utilised. A detailed development plan review process was carried out to check access width, parking layout, internal / external vehicle and pedestrian circulation, sight distance, road safety, drop off/pick up and service vehicle provisions. Following TIS guidelines developed by the Ministry of Transport and Communications (MOTC), traffic was generated, distributed and assigned to the road network using PTV VISUM. A traffic impact assessment was done at key access roads and neighbouring junctions using PTV VISSIM SIDRA and Synchro software.