A 3D model of a traffic warning sign, featuring a triangular red border, white background, and red, yellow, green circular symbols. It has a classic warning style with high detail, suitable for traffic safety scenarios and road design references. （类目纠正：原"Other"不准确，应为"Traffic Warning Sign"）

A 3D model of an airport warning sign, featuring a triangular red-bordered sign with a black airplane icon and black-and-white striped pole. It has a low polygon count and a clear, warning-style aesthetic, suitable for airport traffic safety scenarios.

A 3D model of a narrowing road warning sign, featuring a red border, white background, and black narrowing road symbols, with a highly recognizable warning design. It has a low polygon count and is suitable for road safety applications and traffic warning systems.

A 3D model of a pedestrian overpass, featuring a transparent roof, metal railings, and concrete pillars. It has a modern minimalist aesthetic, high polygon details, suitable for urban pedestrian crossing scenarios. Category: Pedestrian Overpass (corrected from "Other").