Do the Institute of Transportation Engineers (ITE) Vehicle Traffic Control Signal Heads standards include the new U-turn arrow signal indications?
No, not yet, but the U-turn arrow details are anticipated to be developed by ITE and incorporated into an upcoming revision of their standard. Return to Top • Q: How do the standards for traffic signals accommodate the needs of color-vision deficient drivers? Would it be better to add shapes to the signal indications to help the colorblind identify what signal is on? A: Distinguishing reds from greens is by far the most common problem for color vision deficient people. This has been taken into account in the MUTCD, which since the 1930s has specified the relative positions of the different colored signal indications, with red always being above yellow, which is always above green (in a vertically-arranged signal.) This positional requirement also applies to arrow indications, with red arrows always being above yellow arrows, which are always above green arrows. For horizontally arranged signals, similar positional requirements are established, with red always being the left-most indica
