High-speed image sensors play a critical role in inspecting and maintaining transportation infrastructure, especially in high-speed railway and roadways. Mounted on inspection trains or service vehicles, they capture high-resolution images at high frame rates—enabling real-time detection of cracks, wear, or deformations even at speeds over 300 km/h. These sensors are also used in roadways, bridges, and overhead lines, often integrated with drones or mobile platforms. Combined with 2D/3D imaging and AI, they support early fault detection, predictive maintenance, and safer, more efficient infrastructure management.