The Technical Committees comprise 15 specialized bodies organized into four divisions. Their areas of expertise span climate resilience, sustainable and low-carbon infrastructure, urban and remote transportation systems, asset management, digitalisation and smart infrastructure, construction innovation, geotechnical engineering and materials, and multimodal integration. Together, the TCs advance research, promote technical exchange, foster international collaboration, and facilitate the transfer of knowledge and innovation into practice, contributing to safer, more sustainable, and more resilient transportation infrastructure worldwide.