A 3D model of a traffic sign, featuring red border, white triangular background, black right-pointing arrow, metal pole and a high-visibility warning aesthetic. It has low-poly 3D model with clean edges and is suitable for road safety, traffic guidance.

A 3D model of a bridge, with stone/concrete materials, arched spans, and tower-like pillars, featuring a classical aesthetic. It has multiple arches and detailed railings, suitable for architectural visualization or historical scene restoration.

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 a suspension bridge, featuring stone piers, metal cables, and wooden planks, with a classical design aesthetic. It has low polygon count and is suitable for decorative display, architectural visualization, or scene restoration.