Rugged steel bridges, weathered wooden decks, reinforced concrete piers, durable asphalt roadways, sturdy cable suspensions, rust-resistant metal railings, high-strength bolt connections, water-repellent coatings, UV-resistant paint finishes, salt-scratch resistant surfaces, robust drainage systems, erosion-control geomembranes, wind-resistant structural designs, seismic-proof foundations, load-testing simulations, safety-compliant handrails, anti-skid surfacing treatments, corrosion-protected rebar reinforcements.