Search the Internet for local billboard manufacturers in your area, typing the keyword "billboard installation." One great site to use when putting up a new billboard is www.outdoorbillboard.com.
Contact at least three companies and speak with a consultant. Tell them the kind
of billboard you're looking to put up, the size of the sign, preferred location, run time, etc.
Take detailed notes while talking with a billboard consultant so you can later compare them against other companies.
Obtain your free billboard advertising quote after your consultation. Make sure to get at least three bids from several different companies.
Calculate your total budget for the billboard ad. Knowing how much you can afford will help narrow down the company with the best bargain.
Select the billboard advertising company you wish to do business with.