along with pre-stressed and post-stressed tensioning steel in concrete beams, but hey I’m just a dumb contractor
I noticed about 6-7 years ago while traveling through Memphis if you look at the bridges over I-40 east of Memphis you can see cable restraints they've installed between the bridge abutments and the bridge beams. My guess is the bridges are held together mostly by gravity and the cables were installed later to prevent the bridges from shaking apart in the event of a big earthquake. Those cables are on every bridge over I-40 for about 60-70 miles east of Memphis. I've seen a few on the Arkansas side, too.