Hell, it might even be possible to add a working clock... The OpenBVE sample route showing animated objects have indicated that its possible to add a clock although it was an old analog one.
I have the code for that. the code that powers the R46's LCD's is a derivative of the code. If one has the creative commons Alstom Metropolis, the code lies beneath there.
To make the true code, would be a combination of both codes, including a gap within the textures for the LCD to show the clock briefly.