The 12 Biggest Breakthroughs In Transportation Technology

The 12 Biggest Breakthroughs In Transportation Technology — page 1
1 ROADS PAVE WAY FOR NEW TRANSPORTATION MODES For the earliest humans the first means of transportation was simply walking People followed paths trampled by animals Later they built roads to make travel easier The first evidence of roads built by people appeared in approximately 4000 BCE A city in what is now Iraq had streets paved with stone Other early roads were made of packed earth Travelers followed them on foot atop animals and later in vehicles pulled by animals The Roman Empire built the first major road system starting in approximately 300 BCE A typical Roman road had several layers A trench was filled with large stones These were covered with smaller stones cement and sand A top layer of smooth paving stones formed the surface of the road These well-built roads linked trade routes between Europe and Asia Modern technology has led to complex highway systems 4