About

Reachability is an important topic in transportation planning. It is not only an assessment of current network connectivity, but also a measure that can be used to improve the network connectivity and efficiency. Further, it can be served as a tool to identify the problem. For example, we can assess the reachability of the first-aid facility (i.e., hospital, fire station) to their surrounding neighborhood. If certain neighborhoods are out of reach in desired time, then new facility should be sited.

The objective of this web tool is to help transportation engineers, researchers, and public to efficiently measure the reachability from points of interest. It uses colored polygon to visualize the places that can be reached from selected origins in different time intervals. Furthermore, different modes of transportation are also provided. The travel time used in this application is the real traffic time obtained from GTFS.

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