In 2013, Egwin Avau and Maarten Baeten, from the Learning in Community UI Bikes class, created digital signs encouraging bicycle registration across campus.
The dimensions are as follows:
Housing: JPEG 1921 pixels wide x 827 pixels high
Examples and more info: http://www.housing.illinois.edu/Policies/Electronic%20Signage.aspx
Campus Rec: JPEG 1185 pixels wide x 885 pixels high
More info: http://www.campusrec.illinois.edu/sponsors/
MTD has 2 sizes: JPEG 1080 pixels wide x 480 pixels tall, and 540 pixels wide x 950 pixels tall
*Most screens are vertically oriented (ad at the bottom) but two are horizontally oriented (ad on the right).
More info: http://www.cumtd.com/advertise/displays
This is what they look like (see the little “be alert” yellow ad toward the bottom): http://www.cumtd.com/the-inside-lane/new-design-implemented-on-stopwatch-kiosks/