Having up-to-date equipment is important to sound traffic signal operations. The signal controller should be upgraded, at a cost of approximately $10,000 each, minimally every 10 years. Routine traffic signal timing updates cost $3,000 or less per intersection.
Facebook. 1  the brand name of a social media service and website, launched in 2004. 2  to communicate with (a person) or search for information about (a person) by using Facebook: My old boyfriend just Facebooked me. 3  to post on Facebook: I facebooked some photos of my cat.
On the Facebook, social networking site a wall is a section in your profile where others can write messages to you or leave you gifts, which are icon-like small images. The wall is a public writing space so others who view your profile can see what has been written on your wall.