The departure of Abbey Mayer is the latest in a string of more than 16 managers, directors and other top personnel to leave HART.
Local officials believe their $8.16 billion cost estimate remains sound, despite the shortfall identified in an unreleased draft report.
The city is set to test its new smart-card pass this summer and then launch the full system early next year.
Outgoing chairman Ron Menor pleads for his colleagues to “rise above personal differences and political ambitions.”
HART officials say their predecessors made “placeholder” estimates without studying their legitimacy.
It’s a rare financial bright spot for the massive Honolulu project, which has struggled to stay on budget.
HART officials say a review of compensation payments to property owners has turned up possible violations of federal law.
HART doesn’t keep track of the totals, but its point-in-time counts suggest fewer people are employed than had been projected.