Under national standard GB 1589-2016, what are the maximum total body length limits for standard two-axle passenger buses and articulated city transit buses (铰接城市客车)?

1. 12.0 meters for standard two-axle passenger buses, and up to 18.0 meters for articulated city buses
2. 10.0 meters for standard buses, and up to 14.0 meters for articulated buses
3. 15.0 meters for standard two-axle buses, and up to 22.0 meters for articulated buses
4. 8.5 meters for all urban passenger buses