This study estimates the dose-response relationship between Body Mass Index (BMI) and crash risk in commercial motor vehicle operators. Intake data was collected on 744 new truck drivers who were training for their commercial driver's licenses at a school operated by the cooperating trucking...

This paper assesses the effectiveness of child safety seat laws. These laws progressively increased the mandatory age up to which children must be restrained in safety seats in cars. We use US Fatality Analysis Reporting System (FARS) data from 1978 to 2011 and rich state-time level variation in...

Uber and similar rideshare services are rapidly dispersing in cities across the United States and beyond. Given the convenience and low cost, Uber has been characterized as a potential countermeasure for reducing the estimated 121 million episodes of drunk driving and the 10,000 resulting...

The presence of a heavy truck on the road can impose an externality if accidents occur that would not have otherwise. We find each additional truck on the road increases the risk of a truck accident – but also, at an even higher rate, the risk of a car-on-car collision. Our estimates imply two...

Air pollution can lead to traffic accidents either by reducing the road visibility or impacting the driver’s health and cognitive abilities. The objective of this paper is to explore this relationship between air pollution which is measured by PM2.5 and traffic accident which is measured by...

In the past 25 years, several states and the District of Columbia have implemented statewide marijuana laws. By employing difference-in-differences model and using the data from the Fatality Analysis Reporting System (FARS), this paper focuses on the effects of policy changes that legalize the...

In this paper, we analyze the relationship between potential worker supply, measured through sex ratios, and commuting times in the United States. Using the American Time Use Survey 2003-2014, we analyze the relationship between commuting times and sex ratios by state and age, and show that the...

This study adopts a discrete choice modelling methodology to evaluate individuals' preferences over planning alternatives for an urban site of environmental interest. Since such projects involve some uncertainty and irreversibility, a special attention is devoted to the estimation of the...

In this paper, we propose a new spatial framework to model excess commuting of workers and we show empirical differences between the self-employed and employees in the US. In a theoretical framework where self-employed workers minimize their commuting time, employees do not minimize their...