This part of GB 5768 specifies the general requirements and use of speed limit signs and markings on roads.
This part is applicable to the setting of speed limit signs and markings on highways, urban roads, and various types of roads in sites that are within the jurisdiction of unit but allow social motor vehicles to pass through, squares and public parking lots used for public traffic. It may serve as a reference for the speed limit signs and markings set in places for passage of other motor vehicles and parking lots.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 5768.2-2009 Road traffic signs and markings - Part 2: Road traffic signs
GB 5768.3 Road traffic signs and markings - Part 3: Road traffic markings
GB 5768.4 Road traffic signs and markings - Part 4: Work zone
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
speed limit
maximum speed at which a motor vehicle is allowed to travel on a specific section of the road
3.2
design speed
speed adopted in road geometric design
3.3
operating speed
speed at which the driver operates the vehicle where the traffic is in free flow state and the weather is fine. Generally, the 85th percentile speed measured on a section or feature point of the road section is adopted
