Bill Lindeke occasionally posts "Signs of the Times" he encounters while documenting city life. Here's one he found on a new bus, instructing riders how to open the doors. (I've added a little more help....)
It took me back to my days of teaching information design and Don Norman's The Psychology of Everyday Things, where he introduced the term "affordance" to describe physical features that "afford" a user control over a function — in this case, opening a door.
Now he says,
Here's an example of another door, from an airport entrance. No matter how many times I go there, I am drawn to the panels on the sides of the opening because they are outlined in green with green rectangles that mimic push bars, while the center doors are in effect canceled out with red slashes that seem to signal stop and arrows warning that the doors open automatically.
So many of our doors are designed with perceived affordances that send confusing signals. Look at the bus doors. We are accustomed to pulling on protruding door handles and pushing on flat bars or panels, so whenever a door violates the convention, a sign is required. I suspect those "handles" serve as stair rails when the doors are pushed inward.
What may have seemed like a clever design is marked as a design failure by the words on the yellow tapes, and the handwritten arrows indicate the tapes are also insufficient to override what those handles are saying.