Ordinarily, an excavation like this would have to wait until ADOT had a highway construction project to work on (lane widening, new freeway construction, etc.) -- that way the cost would be included in the project’s scope. But this site’s a little different…
ADOT does a lot of digging, but we have to be very careful not to disturb any historic (or prehistoric) sites that could be at a potential project site. That’s where the ADOT Historic Preservation Team comes in. As a part of ADOT’s Environmental Planning Group, this team is in place to make sure all ADOT projects adhere to state and federal historic preservation laws.
Most people don’t find the sound of traffic especially soothing … ADOT certainly recognizes this and is constantly working to minimize the impacts to surrounding neighborhoods from the noise of new freeways.
ADOT can’t just construct a freeway wherever and however it wants… Building a road actually requires a lot of careful planning, thought and exploration long before the first construction crews ever arrive on site.