The Unified Voice of Laredo. LMCA is a non-profit trade association representing the trucking industry. Laredo Motor Carriers Association is a non-profit trade association representing the trucking industry, committed to support and advocate for a safe, efficient and profitable trucking industry by promoting highway safety providing educational programs, seminars and training.To serve the core needs of our member while proactively working to enhance compliance with federal, state and local laws and maintaining the highest standards of ethics and integrity in its relationships with members, government officials, public and other coalitions and associations.