U.S. Routes paved with materials other than asphalt or concrete

[Joseph R P]

What are some sections of U.S. Routes (including Business loops and Alternate routes and such) that are or fairly recently once were paved with other materials other than asphalt or concrete (cobblestone, brick, or even unpaved, excluding things like brick crosswalks or intersections of course)? This is the first time I have ever thought about this so I'm not sure if it's a one-off subject or not, but I noticed that US 340 ALT (Shenandoah and High Streets) through Harpers Ferry, West Virginia appears to be paved with cobblestone: https://www.google.com/maps/@39.3229225,-77.730247,3a,90y,271.15h,90.16t/data=!3m7!1e1!3m5!1srnC_T6Js4W4NV5Dokup3Yg!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DrnC_T6Js4W4NV5Dokup3Yg%26cb_client%3Dmaps_sv.tactile.gps%26w%3D203%26h%3D100%26yaw%3D240.07224%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192?entry=ttu

[tigerwings]

US 12 (Michigan Ave) in Detroit still has brick from Rosa Parks to 6th St.

[Bitmapped]

What are some sections of U.S. Routes (including Business loops and Alternate routes and such) that are or fairly recently once were paved with other materials other than asphalt or concrete (cobblestone, brick, or even unpaved, excluding things like brick crosswalks or intersections of course)? This is the first time I have ever thought about this so I'm not sure if it's a one-off subject or not, but I noticed that US 340 ALT (Shenandoah and High Streets) through Harpers Ferry, West Virginia appears to be paved with cobblestone: https://www.google.com/maps/@39.3229225,-77.730247,3a,90y,271.15h,90.16t/data=!3m7!1e1!3m5!1srnC_T6Js4W4NV5Dokup3Yg!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DrnC_T6Js4W4NV5Dokup3Yg%26cb_client%3Dmaps_sv.tactile.gps%26w%3D203%26h%3D100%26yaw%3D240.07224%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192?entry=ttu

That's concrete with a rough texture, not cobblestone.

[Mapmikey]

US 60 EB on Cary St between 12th and 14th is decorative brick

https://maps.app.goo.gl/Ki1M4Bdivpu3crCm7

[ElishaGOtis]

SOLAR FREAKIN' ROADWAYS!! 

MO tried to test this within the Route 66 welcome center (technically a US route, right?), but the project was cut short due to funding.

[Avalanchez71]

When was the last section paved?

[kphoger]

When was the last section paved?

↓   Agent Steel to the rescue!   ↓

The last was US-183 in Nebraska, which was paved in 1967.

the last gravel US route was a section of US-183 in Nebraska.  It was paved between 1967 and 1968.