Carson City could try to reduce and delay a $15 million payment it owes the state for work on the U.S 395 bypass.Under an amended agreement, the Nevada Department of Transportation could drop the payment from $15 million to $10 million and wait to collect the money until it finishes the bypass, said Patrick Pittenger, city transportation manager.Carson would take over maintenance of several state roads in exchange, he said. Roads could include parts of College Parkway, Airport Road and Highway 50.The $15 million is due by July 1 under an agreement between the city and the state. The city …