Resignation letter from MTA CEO Art Leahy

The chief ex­ec­ut­ive of the Los Angeles County Met­ro­pol­it­an Trans­port­a­tion Au­thor­ity said Tues­day he will step down in April after six years of over­see­ing both high-pro­file fail­ures and ma­jor mile­stones dur­ing the most am­bi­tious rail ex­pan­sion agenda in the agency’s his­tory.