Reducing emissions of pollutants from cars requires that new vehicles be designed and built to pollute less, and also requires some ongoing inspection and maintenance programme to ensure that a vehicle's operation conforms to those design standards. This paper focuses on these programmes,...

I arrived here at the UC Transportation Center just nine months ago. A former lawyer and aspiring writer, I had only a layman's knowledge of transportation systems, mostly based on my personal experiences.  Growing up in Hilo, Hawaii, I thought traffic jams meant having to circle the parking...