With an expected population of 400 million by 2040, America is morphing into an economic system composed of twenty-three 'megapolitan' areas that will dominate the nation’s economy by midcentury. These 'megapolitan' areas are networks of metropolitan areas sharing common economic, landscape, social, and cultural characteristics. The rise of 'megapolitan' areas will change how America plans. For instance, in an area comparable in size to France and the low countries of the Netherlands and Belgium – considered among the world's most densely settled – America's 'megapolitan' areas are already home to more than two and a half times as many people. Indeed, with only eighteen percent of the contiguous forty-eight states’ land base, America's megapolitan areas are more densely settled than Europe as a whole or the United Kingdom. Megapolitan America goes into spectacular demographic, economic, and social detail in mapping the dramatic – and surprisingly optimistic – shifts ahead. It will be required reading for those interested in America’s future.

This study takes a megaregion approach to project future travel demand and choice of transport modes in the Texas Triangle, which is encompassed by four major metropolitan areas, Dallas-Fort Worth, Houston, San Antonio, and Austin. The model was developed based on three behavioral characteristics of human travel. First, as income grows, demand for more and faster mobility increases. Second, on average, individuals allocate 1-1.5 hours per capita per day for travel. Third, people allocate 10-15% of per capita personal income for transportation related expenses. Measured by person-kilometers of travel (PKT), the total mobility demand in the Triangle region is projected to grow nearly four times from 480 billion in year 2000 to 1.8 trillion in year 2050. Per capita PKT is expected to increase from 32,700 to 61,000 for the same time period. The projections show that more than 70% of the year 2050 travel demand likely comes from high-speed travel at 600 km per hour. The study results call for serious consideration of investing in high-speed travel in the form of High Speed Rail (HSP) now in order to accommodate the future travel demand in the Triangle Region.

In Imagined Frontiers, urban historian and popular culture scholar Carl Abbott looks at the work of American artists who have used novels, film, television, maps, and occasionally even performance art to explore these frontiers--the metropolitan frontier of suburban development, the classic continental frontier of American settlement, and the yet unrealized frontiers beyond Earth.