Toll road contract in Texas allows state to lower speed limits on nearby interstate freeway to avoid paying penalties to a private company. The Texas Department of Transportation (TxDOT) has agreed to consider lowering the maximum speed limit on a stretch of interstate highway that competes with a planned toll road. Cintra-Zachary, a joint Spanish-US venture, paid TxDOT $1.3 billion for the right to collect tolls on 40-miles of State Highway 130 set for construction beginning in 2009. Although TxDOT suggested that free market competition was part of the goal of using a public-private partnerships to construct and operate roads,...