The average tractor-trailer travels less than 7 miles on a gallon of diesel, making it one of the least-efficient vehicles on the road. Spurred by pollution regulations and sluggish demand, truck makers are trying to change that.
WSJ.com: WSJD, Wall Street Journal: Technology
Thu, 09/21/2017 - 6:07am
The average tractor-trailer travels less than 7 miles on a gallon of diesel, making it one of the least-efficient vehicles on the road. Spurred by pollution regulations and sluggish demand, truck makers are trying to change that.