KUSA - Many drivers on the East and West Coasts are paying up to a dollar a gallon more than drivers in the Rocky Mountain region.
Analysts say oil is bottle-necked in the Rockies because U.S. pipelines were built to carry oil from the coasts inland, not in the opposite direction.
Relatively low fuel taxes also help keep gasoline prices low in the surrounding Rocky Mountain states.
The Rocky Mountain region also has a relative abundance of oil from booming fields in Canada and North Dakota.
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