Movement of People and
Products via Airlines
The Terminal at the Los
Movement of Goods via Container Ships in Los Angeles Harbor
Intermodal Transfer Facility at Los Angeles Po
The Importance of Transportation in the U.S.
16% of the U.S. gross domestic product (GDP) in 1999.
$1.48 Trillion on transportation expenditures in 1999.
70% of all petroleum in the U.S. is used for
transportation in 1999.
C HAPTER 3
Characteristics of the Driver,
the Vehicle and the Road
In 1992, there were 173 million licensed drivers.
In 1992 there were 0.73 licensed drivers per registered
9.6% of the drivers in
Geometric Design of
Geometric Design Standards
National Criteria published by:
American Association of State Highway and
Transportation Officials (AASHTO) A Policy on
the Geometric Design of Highways and Streets
Capacity and LOS
Posted Speed Limits: 40 55 mph
Undivided or have medians
Located in suburban areas or in high-volume
May include two-way left-turn median lane
Traffic volumes: 15,000 40,000