News & Announcements Rock Region METRO launches its first five zero-emission mass transit buses today, the first in The Natural State. The 40-foot Proterra ZX5 Max vehicles will be placed in service on area streets in July following additional staff training. The buses were primarily funded by a 2021 $4.9 million “Shock the Rock” FTA 5339 Bus and Bus Facilities competitive grant, the agency’s largest competitive grant award to date, to purchase the buses and their related charging infrastructure. Read more