Abstract
With the aims of promoting of social and economic development, Hai Phong city is completion of transportation infrastructue connecting outside urban areas. The roads with complicated geometric feature such us the cross Cat Ba island road (provincial road 356) has inherent risks in traffic safety. Using model Interactive Highway Safety Design Model - IHSDM to Analyze , assess the effect of geometric factors cross Cat Ba island road on traffic safety is necessary. The result presents charts make predictions about the risks of traffict accident on the road and. The output is used in giving recommendations on traffic ozganization in operation progress.