Here, lies how most Avenger members get in. It's hidden, in plain site, of course. But this is for those that don't have any physical abnormalities that they don't need to hide. Now, those that may have another form of transportation other than taxi or car. They will have other means of entering the building. Visitors also come there here, and go through several security checks to make sure that they are safe before they even see the Avengers.
