GB 50688-2011 English PDF

GB 50688-2011: Code for Design of Urban Road Traffic Facility
Delivery: 9 seconds. Download (& Email) true-PDF + Invoice.
Get Quotation: Click GB 50688-2011 (Self-service in 1-minute)
Historical versions (Master-website): GB 50688-2011
Preview True-PDF (Reload/Scroll-down if blank)

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 Survey
3.0.1 Traffic survey shall be carried out for urban road traffic facility design.
3.0.2 Traffic survey content shall cover the road network state in the location
area, the current state of land use along the line, the environment along the line,
the road and traffic conditions, the urban planning and the road network
planning. Except the design road itself, the surrounding area having effect on
the design road shall also be covered.
3.0.3 The following conditions shall be analyzed on the basis of investigation
and data collection in design of constructed road traffic facilities:
1 Social economy, traffic development, topography, climate and weather in
the located area of the project as well as the land development and utilization
conditions along the line of the project;
2 Relevant surrounding road grade, alignment, cross section arrangement
and traffic facility arrangement conditions;
3 Main road traffic characteristics, traffic organization and management
situation surround the project;
4 Status, function and road grade of the project in the planning of road
network;
5 Forecast traffic volume, traffic organization and traffic characteristics of
the project.
3.0.4 For design and investigation content of traffic facilities in renovated and
extended road engineering, except the information required by the new
engineering, the following contents shall also be supplemented in case of need:
1 Conditions of the existing road traffic facilities;
2 Conditions of the existing road traffic;
3.0.5 In renovation engineering design of road traffic facilities, the information
such as the existing geometric conditions of road, traffic volume, composition,
flow characteristics and accident shall be analyzed comprehensively; and
moreover, the predicted traffic information shall be analyzed and judged.
4 Overall Design
4.1 General Requirements
4.1.1 Overall design of the urban road traffic facility shall meet the requirements
of the overall objectives such as security, smoothness, environment protection
and sustainable development.
4.1.2 Overall design of the urban road traffic facility shall coordinate with the
design of the principal part of the road engineering, according to road function
and its function in the urban road network, the factors such as design, work,
maintenance, operation, management as well as short-term and long-term are
comprehensively considered so as to exactly embody the intention of the main
design for the road engineering.
4.1.3 Urban road traffic facilities shall not only maintain the respective
characteristics and relative independence, but also match and coordinate with
each other, so that they become a unified, coordinated and complete system
engineering.
4.2 Grading of Traffic Facility
4.2.1 Overall planning and design shall be carried out for urban road traffic
facility design according to the grade.
4.2.2 Grade of urban road traffic facility shall be divided into Grades A, B, C and
D, and shall meet the following requirements:
1 For Grade A facilities, signs, markings, isolation and protection facilities
with improved system shall be arranged; central separate crash guardrail and
necessary anti-glare facility must be arranged continuously in the central strip;
and crash guardrail must be arranged at roadside for bridge, high embankment
as well as road section with side road and side walk beside which may
endanger life and structure safety after crash; signs for guiding and prohibition
shall be arranged continuously for the grade-separated junction and the
surrounding road network; delineator shall be arranged continuously on both
sides of main road and ramp carriage way; branching triangle end at exit shall
be provided with eye-catching warning and collision protection facility; ramp
control signal lamp shall be arranged for actually controlled ramp; the traffic
surveillance and control system shall be arranged in accordance with Grade II;
and the medium-long, long and super-long tunnels shall be arranged in
accordance with Grade I;
2 For Grade B facilities, improved signs, markings, as well as necessary
isolation and isolation and protection facilities shall be arranged; road section
4.3.2 The interface and joint between the overall design and the principal part
of the engineering design shall be defined, and moreover, the specialized
design interface and joint of urban road traffic are coordinated so as to avoid
interference among facilities.
4.3.3 In the overall design, professional traffic facility design plan shall be
developed by organizing traffic facilities, the connection and assistance
between facilities are coordinated.
4.3.4 For the overall design, the road traffic facility design plan shall be
optimized and perfected according to the road service level of principal part of
the engineering design and security assessment conclusion.
4.3.5 Functional requirements on evacuation, salvage and rescue under special
traffic safety or emergency occasions shall be proposed in the overall design.
4.4 Design Interface
4.4.1 When traffic signs, delineators, protection facilities, traffic signal and
monitor system field equipment, lighting and power transformation and
distribution facilities are arranged on road structure or bridge, tunnel structure,
the designer of the traffic facilities shall provide the arrangement stake No.,
reserved hole size, structural gravity and load-carrying conditions; the design
of embedment and reserve shall be carried out by the designer of the principal
part of the engineering while he is designing the structure or bridge and tunnel
structure. The arrangement and installation of traffic facilities are designed by
the designer of traffic facilities.
4.4.2 When protection facilities with crash requirements are arranged on road
structure or bridge, tunnel structure, crash grade, geometric size and structure
design of collision protection facility as well as design for rigid-soft collision
protection transition section at structure end shall be provided with by the
designer of traffic facilities; the designer of the principal part of the engineering
shall carry out the design of road structure or bridge and tunnel structure.
4.4.3 Communication and signal system piping embedded in road subgrade
cross section shall be determined by the designers of traffic facilities and
principal part of the engineering and layout position of the piping is determined
by the design of the traffic facility designer; the principal part of the engineering
designe...