"TTM-Next Steps" = Tamiami Trail Modifications - Next Steps = A future bridging project of the Tamiami Trail (US 41) in Shark Valley Slough region, to enhance water flow in the Everglades. A total of 5.5 miles of additional bridges is proposed within the 11 miles immediately west of Krome Ave. See official TTM website.
"LRR" = Tamiami Trail Modifications Limited Reevaluation Report = A 1-mile bridge being constructed as part of the Tamiami Trail (US 41) to improve water flow to the Everglades. See official LRR website.