The Profession of Transportation – Importance of Transportation – Transportation History – Transportation Employment – Summary – Problems – References – Transportation Systems and Organizations – Developing a Transportation System – Modes of Transportation – Transportation Organizations – Summary – Problems – References – PART TRAFFIC OPERATIONS – Characteristics of the Driver, the Pedestrian, – the Vehicle, and the Road – Driver Characteristics – Perception-Reaction Process – Older Drivers’ Characteristics – Pedestrian Characteristics – Bicyclists and Bicycles Characteristics – Vehicle Characteristics – Road Characteristics – Summary – Problems – References – Traffic Engineering Studies – Spot Speed Studies – Volume Studies – Travel Time and Delay Studies – Parking Studies – Summary – Problems – References – Highway Safety – Issues Involved in Transportation Safety – Strategic Highway Safety Plans – Effectiveness of Safety Design Features – Summary – Problems .