Here in New England we have paved cow paths that they call highways. The on-ramps and off-ramps are very short and tight. On 2 lane roads in N.E. you sometimes have to STOP at the bottom of an on-ramp and wait for an opening. Once on the highway, stay in the left lane and cruise until its time to get off. I see so many accidents because of these on/off ramps.
About 90 people/day die in vehicle accidents in the US
http://www.ntsb.gov/news/2011/data/Piechart_2010.pdf