Policy

Locational data, logged on portable GPS units and matched with accelerometer data, was used to examine associations of the built environment with physical activity and sedentary behaviors of adolescent females. In a sample of 293 adolescent females aged 15 to 18 years old in Minneapolis and San Diego, the built environment around each GPS point and its corresponding sedentary, light, and moderate-to-vigorous intensity physical activity was examined using random intercept multinomial logistic regression models. The odds of higher physical activity intensity (3-level outcome: sedentary...

This paper compares safety of automated and manual highway systems with respect to result- ing rear-end collision frequency and severity. The results show that automated driving is safer than the most alert manual drivers, at similar speeds and capacities. We also present a detailed safety-capacity tradeo study for four di erent Automated Highway System concepts that di er in their information structure and separation policy.

En esta investigación se examina la forma como se usa la motocicleta, sus causas, y sus consecuencias en cinco ciudades de América Latina (Bogotá, Barranquilla, Buenos Aires, Caracas y San Pablo). El propósito es generar insumos para la formulación de políticas públicas que contemplen las múltiples dimensiones del uso de la motocicleta, al mismo tiempo que busque resolver las principales consecuencias negativas que su uso conlleva. Sirve también para llamar la atención sobre otras investigaciones que deben profundizarse sobre el tema. Del trabajo realizado se desprenden factores que...