The problem with only counting "train" accidents is that this ignores the collateral damage at grade crossings. The Federal Railroad Administration (http://safetydata.fra.dot.gov/OfficeofSafety/Default.asp?page=graphs.asp) maintains data; there's this year's chart: http://safetydata.fra.dot.gov/OfficeofSafety/Output.asp?file=2007/cht03.gif. The numbers are an order of magnitude higher.
The problem with only counting "train" accidents is that this ignores the collateral damage at grade crossings. The Federal Railroad Administration (http://safetydata.fra.dot.gov/OfficeofSafety/Default.asp?page=graphs.asp) maintains data; there's this year's chart: http://safetydata.fra.dot.gov/OfficeofSafety/Output.asp?file=2007/cht03.gif. The numbers are an order of magnitude higher.