Drivers are enjoying some relief at the pump after the United States and Iran signed an agreement to reopen the Strait of Hormuz.

© Vincent Alban/The New York Times

The preliminary agreement may not have an immediate effect on prices at the pump. Damaged infrastructure and risky transport could keep costs up.

© Jenny Kane/Associated Press

Some analysts said the main international oil price, which was up 6 percent on Monday, could climb much higher in the coming weeks if the Strait of Hormuz doesn’t reopen.

© Damian Dovarganes/Associated Press