With the threat of losing millions in federal transportation funds, Montana Gov. Judy Martz signed legislation last month to lower the state's blood-alcohol concentration limit from 0.10 percent to 0.08.

SB13 won approval in the House in March by a 94-4 vote. The bill previously passed the Senate 49-1.

Montana had up till now resisted a two-year-old federal law requiring all states to adopt the 0.08 standard by October or risk losing 2 percent of its highway money.