In developing countries, the growing use of autos is creating a clash with pedestrians. Pedestrian-vehicle collisions clearly have immediate negative consequences on public health. In the longer run, if walking is not safe, comfortable, and convenient, it is likely to decline as a mode of travel in countries where households and individuals increasingly have the means to choose alternatives. Even so, most people will continue to walk for many trips, and with increasing motorization will be at risk of harm unless the safety and comfort of the walking environment is improved. We use data...