What's the blue road sign?

Blue road signs refer to expressways. The background color of expressway signs is green, and the background color of expressway signs is blue. The color recognition of expressways and expressways can mainly focus on the display boards on expressways. Green highway background board, usually accompanied by white text floor. When driving a vehicle, the owner can quickly distinguish the grade of the road through the basic street sign information. The sign of the expressway is green and the sign of the expressway is blue.

Related introduction

Road signs are generally white on a blue background and white on a green background. From the functional point of view, white characters on a blue background are information signs, while white characters on a red background are warning signs, telling you that there is danger ahead, and black characters on a yellow background are road traffic signs, telling you the important road conditions ahead. No part of road traffic signs shall intrude into the boundary of highway buildings.

The installation height of traffic signs of road survey columns should consider its layout specifications, linear characteristics of its position, whether there is pedestrian traffic and other factors. In order to compare the difference between blue and green, we can use the symbol of the imperial capital as an example. Blue signs are used for general roads, and green signs are used for expressways or expressways.