U.S. Senator Amy Klobuchar says the nation isn't ready for a lower highway speed limit. Klobuchar met with Minnesota truckers to talk about high diesel prices. Diesel fuel is 70-percent higher than it was a year ago, and truckers say it's adding to the cost of practically everything. The Minnesota Trucking Association is calling for a national speed limit of 65-miles-per-hour. Senator Klobuchar told the truckers she hopes individuals will choose to reduce their speed to save gas and money, but Congress won't require it.