Other than the transit that allows seniors and disabled to such things as a Medicare/Medicaid card to get a discount, I found Tri-Rail to be the best.
For me, a (service connected) disabled veteran, I upload my VA Card and a passport-type photo along with a simple application and they will mail me a use-free Easy Card.
For my wife, a senior, she uploads proof of age and a photo. When they approve it, they email a link where the $2 charge can be paid. They then mail the card.
Couldn't be easier. We'll be in Ft. Lauderdale later this year for a cruise (and a ride on Brightline).