Supply and demand impacts all of us on the highways, whether in the country and in the cities. Fuel costs have tripled, but the gas tax at $1.10 per gallon has STAYED THE SAME since 1991. Because of inflation we have less & less money available to pay for roads and bridges. Funding for new roads has not kept pace with the population growth, so we have gridlocks & grows worse each year. Commuter trains help a bit as does carpooling and telework. It will take a combination of these + new construction to work out way out of this dilemna according to Ginger Goodin, senior research engineer at the Texas A&M Transportation Institute at College Station, TX.