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The paper studies the role of social capital in the urban informal sector in Bolivia. It shows that a formal firm has about 6.4 times the sales of an informal firm with no social capital, but informal firms use their social capital to compensate for the lack of formal productivity benefits. By being formal, firms obtain permanent visibility because they can operate a shop or a visible production location and they can produce in locations with better public infrastructure. Informal firms, in contrast, sell in one place – typically in street markets in front of formal shops – and produce Ray Ban AAA Sunglasses Black Gray Rayban-0167 in another — typically in the outskirts. Social capital increases accessibility of informal firms and provides them with security benefits at their production location. Pedestrians’ road-crossing behavior can often interrupt traffic flow and cause vehicle queueing. In this paper, we propose some moving rules for modeling the interaction of vehicles and pedestrians. The modified visual angle car-following model is presented Ray Ban AAA Sunglasses Black Wood Color Rayban-0206 for the movement of vehicles with consideration of the lateral effect of waiting pedestrians. The pedestrians’ behavior is summarized as consisting of three steps: pedestrian arrival, gap acceptance, and pedestrian crossing. Some characteristic parameters of pedestrians are introduced to characterize pedestrians’ behavior. Simulation results show that the interaction of vehicles and pedestrians lowers the traffic capacity and increases delays to both vehicles and pedestrians.