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 two-way arrow traffic sign, featuring a round red-bordered design with white background, red and black arrows, and a black-and-white striped pole, showcasing a clean functional aesthetic. It has low polygon count and is suitable for traffic scenario visualization.

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 slope warning road sign, featuring a red and white triangular border, black slope pattern with "10%" text, and a road safety aesthetic. It has low polygon count and clean 3D rendering, suitable for traffic route safety information display.