This is the most likely reason. They should have put a sign, but the ramp looks right to me if you want them to match pedestrian speed when merging into a pedestrian space.
I am an Engineer and have done things both ways throughout my career. What is easy to miss in digital are the overall holistic design and the way it all fits together, because you are always zoomed in on a particular piece of the puzzle and rarely see the whole thing on screen in a meaningful way. There is just something about seeing a full design laid out on paper, spread out on the table, that lets many little things jump out at you.
This was obviously not a good system design, but a box full of relays and PLC controller cost a whole lot less than the all-in employer cost of an extra employee.
They really should also be able to turn off the lights at the breakers unless they did something exceptionally stupid like put the fire control panels on the lighting breakers.
https://www.youtube.com/watch?v=wsZ6YPsPpj0