How have humans developed transportation to fit their surroundings? Objective 1. To explain how the topography of Pennsylvania led to the building of the Allegheny Portage Railroad; 2. To describe the innovative technology used to build the railroad and explain how it was applied to other projects; 3. To compare the technology and level of success of the Pennsylvania Main Line of Public Works with contemporary transportation systems; 4. To discuss the effects of technological change and the future of transportation; 5. To investigate their area's transportation history. Preparation Imagine rid Duration: 90 Minutes.