Pipeline Transportation Safety Improvement Act of 2011

[AI summary unavailable — showing source text] Pipeline Transportation Safety Improvement Act of 2011 - Prescribes or revises requirements for safety and environmental protection in pipeline transportation. Defines the term "major consequence violation" to mean a violation that contributed to an incident resulting in: (1) one or more deaths or injuries or illnesses requiring in-patient hospitalization; or (2) environmental harm exceeding $250,000 in damage, including property loss (other than the value of natural gas or hazardous liquid lost or damage to pipeline equipment). Subjects to a civil penalty of $250,000 any person that the Secretary of Transportation has found to have committed a major consequence violation of a pipeline marking or excavation notification requirement, pipeline safety standard or regulation, or order. Authorizes the Secretary to impose a civil penalty on a person who obstructs or prevents an inspection or investigation of a gas pipeline or hazardous liquid pipeline. Prescribes a maximum civil penalty of $2.5 million for a related series of major consequence violations. Prohibits a state one-call notification program from exempting municipalities, state agencies, or their contractors from its…