A few nice Historic Route 66 images I found:
Historic Route 66 Indian Chief
Image by spacedustdesign
Originally inspired from a historic Route 66 Neon sign in Downtown Albuquerque.
Historic Route 66 & MacArthur Bridge
Image by Travis S.
Looking south from the arch there are two bridges. The closer one is the old Route 66 passage, which has many other names: I-70, I-64, I-55, I-44, and US40. It is known as the Poplar Street Bridge, or more officially, the Bernard F. Dickmann Bridge.
The truss bridge in the background was named after General Douglas MacArthur. Construction started in 1909 but didn’t open until 1917.