Figure 1-2: Growth in mass of vehicles from four major classes from [Glennan, 2007] other optional features on the mass of automobiles in the United States? Trends in Features What is the trend in deployment of features in each of these areas? Technical Sophistication How can information about vehicle features be used to refine existing measures of technical sophistication? Deployment Scenarios What do past trends in feature deployment rates tell us about possible future deployment of vehicle features? 20
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