Transportation improvements are being propsed by the Johnson City Metropolitan Transportation Planning Organization (MTPO) announcing plans to update the region’s metro transportation plan.The updates, which occur every five years, include improvements to roadways, bridges, walkways, bikeways and transit services using federal funding over the course of the next 30 years.Planning areas include jurisdictions in Bluff City, Elizabethton, Johnson City, Jonesborough and Unicoi as well as parts of Carter, Sullivan and Washington counties.