Regarding your editorial, "Fuel-efficiency law is a start" (Dec. 21), while I agree that regulations are good incentives for auto manufacturers to develop new innovations to boost fuel-efficiency in cars, I would hope that lawmakers won't overlook "road efficiency." Our major highways and interstates are major arteries that need to be free-flowing to serve their optimum purpose. At rush hour, I feel the majority of exits should be closed within 20 miles of an urban area. Even if a car technically gets 40 miles per gallon efficiency, it is wasted if a traffic snarl brings traffic to a standstill. Reducing traffic congestion to avoid burning fuel wastefully should be a centerpiece of any fuel-efficiency program.

James A. Marples