GB 50688-2011 English PDF (GB50688-2011)

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GB 50688-2011: Code for design of urban road traffic facility
GB 50688-2011
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50688-2011
Code for Design of Urban Road Traffic Facility
ISSUED ON: MAY 12, 2011
IMPLEMENTED ON: MAY 1, 2011
Jointly issued by: Ministry of Housing and Urban-Rural Development of
the People's Republic of China;
General Administration of Quality Supervision,
Inspection and Quarantine of the People's Republic of
China.
Table of Contents
Foreword ... 4
1 General Provisions ... 9
2 Terms and Symbols ... 10
2.1 Terms ... 10
2.2 Symbols ... 12
2.3 Designation ... 13
3 Traffic Survey ... 14
4 Overall Design ... 15
4.1 General Requirements ... 15
4.2 Grading of Traffic Facility ... 15
4.3 Overall Design Requirements ... 16
4.4 Design Interface ... 17
5 Traffic Signs ... 19
5.1 General Requirements ... 19
5.2 Classification and Arrangement ... 19
5.3 Layout Design... 20
5.4 Material ... 22
5.5 Supporting Mode and Structure Design ... 23
6 Traffic Marking ... 24
6.1 General Requirements ... 24
6.2 Marking Arrangement ... 24
6.3 Material ... 26
6.4 Delineator ... 26
7 Protection Facilities ... 28
7.1 General Requirements ... 28
7.2 Crash Guardrail ... 28
7.3 Crash Cushion ... 32
7.4 Delimitation Structure of Collision Protection Facility ... 34
7.5 Pedestrian Guardrail ... 34
7.6 Separate Facility ... 36
7.7 Guard Fence and Anti-fall Net ... 37
7.8 Anti-glare Facility ... 38
7.9 Acoustic Barrier ... 38
8 Traffic Signal Lamp ... 39
8.1 General Requirements ... 39
8.2 Arrangement of Signal Lamp ... 39
8.3 Traffic Signal Control System ... 40
9 Traffic Surveillance and control System ... 41
9.1 General Requirements ... 41
9.2 Management Mode ... 42
9.3 Traffic Surveillance and control Center ... 42
9.4 Message Collection Facility ... 43
9.5 Message Display and Control Facility ... 43
9.6 Message Transmission Network ... 44
9.7 System Link and Safety ... 44
9.8 Main Performance Index of Surveillance and control System ... 45
9.9 Foundation and Piping of Out-field Equipment, Power Supply, Lightning Protection and
Earthing ... 45
9.10 Service Message Facility ... 46
9.11 Changeable Message Sign ... 46
10 Service Facility ... 48
10.1 General Requirements ... 48
10.2 Pedestrian Guide Facility ... 48
10.3 Pedestrian Crossing Facility ... 49
10.4 Parking Facility for Non-motor Vehicle ... 51
10.5 Parking Facilities for Motor Vehicle ... 52
10.6 Bus Stop ... 53
11 Road Lighting and Power Transformation and Distribution ... 56
11.1 Road Lighting ... 56
11.2 Lighting Control ... 59
11.3 Power Transformation and Distribution System ... 59
11.4 Energy Conservation ... 60
12 Management Office and Equipment ... 62
12.1 General Requirements ... 62
12.2 Management Office ... 62
12.3 Management Equipment ... 63
Explanation of Wording in This Code ... 64
List of Quoted Standards ... 65
1 General Provisions
1.0.1 With a view to maintaining order operation, security, smoothness and low
public nuisance of urban road traffic, unifying technical standards of urban road
traffic facility design, guiding engineering construction, and achieving
comprehensive function of urban road traffic facility, security and practical
advanced technology as well as economy and rationality, this code was
formulated.
1.0.2 This code is applicable to design of traffic facilities for constructed,
renovated and extended roads. Urban road traffic facilities shall include traffic
signs, traffic markings, protection facilities, traffic signal lamps, traffic
surveillance and control systems, service facilities, road lighting and power
transformation and distribution as well as management offices and equipment.
1.0.3 Urban road traffic facility shall be designed according to road nature,
environment along the line and traffic flow characteristics; and in addition, it
shall meet the requirements of relevant planning, overall design of road and
energy conservation and environmental protection in the project location area.
1.0.4 The overall dimensions and load of the design vehicle adopted in the
urban road traffic facility design shall meet the requirements of the current
national standard "Limits of Dimensions, Axle load and Masses for Road
Vehicles" (GB 1589).
1.0.5 The urban road traffic facility shall be designed synchronously with the
principal part of the road engineering; and the design is carried out according
to the principles of overall design and phased implementation. For the relevant
foundation engineering and piping of the principal part of the engineering, they
shall be reserved and embedded during implementation of the principal part of
the engineering.
1.0.6 The urban road traffic facility design shall meet the requirements of this
code as well as those specified in the current national standards.
2 Terms and Symbols
2.1 Terms
2.1.1 Right of way
Right of road user to carry out traffic activities in certain space at certain time
according to the requirements of traffic laws and regulations.
2.1.2 Warning sign
The sign used to warn the vehicles and pedestrians for noticing the road traffic.
2.1.3 Prohibition sign
The sign for prohibit or restrict traffic of vehicles and pedestrians.
2.1.4 Mandatory sign
The sign used to direct vehicles and pedestrians.
2.1.5 Guide sign
The sign used to deliver message on road direction, place and distance.
2.1.6 Changeable message sign
Changeable message sign can change its displayed content according to the
change of traffic, road and climate.
2.1.7 Active luminous sign
The sign with figures and symbols and can give out light from inside through
electric energy or other energy resources; under relatively dark environment, it
can be clearly identified.
2.1.8 Retro-reflection
The reflection which the reflecting light reflects from the opposite direction near
the opposite direction and returns to the light source.
2.1.9 Delineator
It is used for indicating heading direction of the road and the edge contour, and
is designed with retro-reflection characteristics or initiative lighting function.
2.1.10 Roadside clear zone
2.1.20 Delimitation structure
Major structure surrounding clearance of carriage way.
2.1.21 Collision protection facilities for main structure
Collision protection member enhanced on the major structure easy to be
collided.
2.1.22 Collision protection facilities for subsidiary structure
Collision protection facility arranged independently ahead of the major structure
easy to be collided for protecting the major structure.
2.1.23 Guard fence
Fence arranged for preventing pedestrians and non-motor vehicles from
entering into the expressway, ramp or other prohibited area.
2.1.24 Acoustic barrier
A specially designed acoustical baffle placed between the noise source and the
sound receiving point.
2.1.25 Traffic surveillance and control
A kind of technical measure for operation and management of road traffic
provided for the traffic manager through collection, treatment and launching of
traffic message.
2.2 Symbols
Eav - average illuminance
Emin - minimum illuminance
Evmin - minimum vertical illuminance
SR - surround ratio
TI - increase of glare limitation value
UE - uniformity of illuminance
UL - longitudinal uniformity of luminance
UO - overall uniformity of luminance
3 Traffic...