Here's intentional homicide with motor vehicles:

2005, United States
Homicide Overall Motor Vehicle Deaths and Rates per 100,000
All Races, Both Sexes, All Ages
ICD-10 Codes: Y03

Number of
Deaths, Population, Crude Rate, Age-Adjusted Rate**
38 - 296,507,061 - 0.01 - 0.00

Much lower than I expected with the way the Media covers such events.