摘要：With the rapid development of national economy in Chennai, imbalance between supply and demand of traffic infrastructures becomes more and more acute, traffic block becomes even more serious, and one of causes is confliction of pedestrian and motor vehicle. Nowadays, pedestrian bridge is an important measure of resolving traffic problems to form people-oriented walk traffic system in Chennai. Building pedestrian bridge is to separate pedestrian from motor vehicle in space, resolve traffic congestion of main road, closely connect pedestrian bridge with subway, sidewalk, shopping promenade, urban residential area and square to perfect walk traffic system and improve trip environment. Certainly, multilevel, multifunctional and multi-implied public space is created besides traffic function of pedestrian bridge, but its traffic function is the primary function now a days. The city pedestrian bridge will only work if it is rationally construction. Among the many factors contributing to the success of the pedestrian bridge construction, the more important one is general layout. To overcome economic constraints, economical design methods are adopted using economically efficient products. To overcome Sustainability constraints, these constraints high performance concrete is used for the construction if applicable. Manufacturability constraints: This can include redesigning of product to reduce the number of parts, simplify fabrication, or utilize common parts and materials.
