If you look closely at that graffiti as you drive through especially from the driver side you'll notice "we are family" written in an ancient Native American script depicting 8 figures grouped around 1 slightly larger figure with a vague but noticeable # 8 on its upper torso.
Lol, a checking at one of the most famous tunnels in sports. Love it, hope you're not reading this while driving unless you can multitask like a pro then cool! Be careful.