At crossings controlled by signals, the most common variety is arranged like this: At each end of a crosswalk, the poles which hold the traffic lights also have white "walk" and Portland Orange "don't walk" signs. These particular colors are used in North America (excluding Quebec) to provide against the backdrop of red, yellow, and green traffic lights. As of the 2000 MUTCD, modern signals are mandated to use pictograms of an orange "upraised hand" and a white "walking man" rather than words; the hand/man display is the mandate as of the 2009 edition. On pedestrian signals displaying text, "don't walk" is spelled without an apostrophe so that it fits easily on the sign. Modern pedestrian signals can be incandescent, neon, fiber-optic, or LED, with the latter three displays typically utilizing less energy.