https://lasvegassun.com/news/2017/feb/21/zipper-merging-to-be-emphasized-in-project-neons-l/ Good in theory but practically really silly since people end up breaking the solid white line and merging earlier. Or worse, they just stop in the lane prematurely to try to merge early blocking all the traffic from flowing. This will also cause more road rage if people merge at the last minute and cut someone off because people don't let you in. Primary example: 95 Southbound to 15 South at the spaghetti bowl Another example: 215 Eastbound to 15 North. Another example: 15 Southbound to 215 West. mostly due to poor signage. just my 2 cents.