The Missouri Department of Transportation, St. Louis District has determined that only Traffic Control Corporation can provide the Department with Econolite specific use products, warranty, and service repairs for existing Econolite products already installed in the St. Louis District. Traffic Control Corporation is the sole regional authorized distributor for Econolite products in the state of Missouri. Repairs by unauthorized repair facilities could void any warranty and/or functional responsibility on the part of the respective manufacturer. These specific products and/or services have been documented as fully and absolutely compatible with all current systems. This notice shall meet the single feasible source posting requirements for one calendar year and in association with the needs described.