Pedestrians and cyclists are a vulnerable group of road users. Immigrants are disproportionally represented in pedestrian and cyclist crashes. We postulate that the mismatch in safety culture between countries of their origin and the USA contribute to their vulnerability in pedestrian and cyclist crashes. Over time, the differences may disappear and immigrants' traffic behavior gravitates toward those of native-borns. We describe this process as safety assimilation. Using the pedestrian and cyclist crash database in New York City between 2001 and 2003, we examined the effects of foreignborn population, their countries of origin, and time of entry into the USA on census tract-level pedestrian and cyclist crashes. We find that neighborhoods with a higher concentration of immigrants, especially those from Latin America, Eastern Europe, and Asia, have more crashes. Our results also exhibit a pattern of the hypothesized safety assimilation process. The study suggests a higher level of vulnerability of immigrants to pedestrian and cyclist crashes. We propose that targeted policies and programs need to be developed for immigrants of different countries of origin.KEYWORDS Pedestrian and cyclist crash, Immigrants, Safety assimilation, Safety culture
INTRODUCTIONWalking and cycling are healthy and environmentally friendly modes of transportation compared to automobile usage. Yet, it is undebatable that pedestrians and cyclists are more vulnerable than motorists in traffic collisions. Nationwide, a total of 4,378 pedestrian and 716 cyclist deaths were reported in 2008, 1,2 accounting for 13.7% of motor vehicle collision fatalities. Another 69,000 pedestrians and 52,000 cyclists were injured in traffic crashes in 2008. 3 Minorities are disproportionally represented in traffic fatalities and injuries. In 2001, 69% of the nation's population were non-Hispanic whites, and yet only 60% of the pedestrian deaths for which ethnicity was known were non-Hispanic whites. 4 In contrast, African-Americans were involved in more than 20% of the total pedestrian deaths, though they represented only 12% of the population. Likewise, 13.5% of the pedestrian deaths involved one or more Latinos, while they accounted Chen is with the