[…] the close-door feature faded into obsolescence a few years after the enactment of the Americans With Disabilities Act in 1990.
The buttons can be operated by firefighters and maintenance workers who have the proper keys or codes.
4.10.7* Door and Signal Timing for Hall Calls
The minimum acceptable time from notification that a car is answering a call until the doors of that car start to close shall be calculated from the following equation:
T = D/(1.5 ft/s) or T = D/(445 mm/s)
where T total time in seconds and D distance (in feet or millimeters) from a point in the lobby or corridor 60 in (1525 mm) directly in front of the farthest call button controlling that car to the centerline of its hoistway door.
Second half of the link article is also about traffic lights / crosswalks.
You might find this interesting too: https://computer.rip/2023-03-13-the-door-close-button.html.
Second half of the link article is also about traffic lights / crosswalks.