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On Nov. 4, voters will ponder at least $60 billion in new transportation-related investments. Twenty-six transportation measures will appear on ballots in 15 states, according to the Center for Transportation Excellence.

"High gas prices, the growing awareness of climate change and the call for energy-efficient living has created a very positive environment for public transportation," research center officials said in a statement.

Three of the more significant measures: a half-cent sales tax in Los Angeles County that would raise up to $40 billion over 30 years to finance new and existing transportation projects; a sales tax increase in the Seattle region to fund $17.8 billion worth of transit projects over the next 20 years; and a $10 billion statewide bond proposal for a San Francisco-to-Los Angeles high-speed rail system.