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GB 5768.4-2017 English PDF (GB5768.4-2017)

GB 5768.4-2017 English PDF (GB5768.4-2017)

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GB 5768.4-2017: Road traffic signs and markings -- Part 4: Work zone

This Part of GB 5768 specifies the requirements for setting of road work zone traffic signs and markings. This Part is applicable to the setting of traffic signs and markings for works such as construction and maintenance of roads, urban roads, and places, squares, public parking lots and other places that are under the jurisdiction of the organization but allow social vehicles. The settings of traffic signs and markings for works such as construction and maintenance of other places where motor vehicles pass can refer to this Part.
GB 5768.4-2014
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 03.220.20
R 80
GB 5768.4-2017
Partially replacing GB 5768-1999
Road traffic signs and markings - Part 4: Work zone
ISSUED ON: JULY 31, 2017
IMPLEMENTED ON: FEBRUARY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Composition of work zone ... 6
5 Road traffic signs and markings in work zone ... 9
6 General provisions on work zone layout ... 18
7 Layout requirements for work zones of expressways and arterial highways ... 21
8 Layout requirements for work zones of two-lane and single-lane highways 28 9 Layout requirements for urban road work zone ... 30
Annex A (informative) Figure legends of signs making of work zone ... 33 Annex B (informative) Safety facilities of road work ... 37
Annex C (informative) Example of typical work zone layout ... 45
Bibliography ... 109
Foreword
All technical content of this Part of GB 5768 is mandatory.
GB 5768 Road traffic signs and markings consists of eight parts:
- Part 1: General;
- Part 2: Road traffic signs;
- Part 3: Road traffic markings;
- Part 4: Work zone;
- Part 5: Speed limit;
- Part 6: Highway-railway grade crossing;
- Part 7: Non-motor vehicles and pedestrians;
- Part 8: School zone.
This Part is Part 4 of GB 5768.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces the part of road construction safety signs in GB 5768-1999 ?€?Road traffic signs and markings?€?. Compared with the part of road construction safety signs in GB 5768-1999, the main changes in this Part are as follow: - changed the colors of work zone marks of road as orange, fluorescent
orange (see 5.1.1);
- changed the shape of ?€?construction sign?€? as triangle (see 5.1.2);
- changed the shape of ?€?detour sign?€? as triangle and adjusted the pattern (see 5.1.4);
- added signs of ?€?decrease number of lanes?€?, ?€?orange arrow?€?, ?€?detour?€?, ?€?linear induction?€?, ?€?attention to traffic guiding personnel?€?, ?€?exit closed?€?, ?€?exit?€?, ?€?pedestrian, non-motor vehicle accesses?€? (see 5.1.3, 5.1.5, 5.1.6, 5.1.7, 5.1.8, 5.1.9, 5.1.10, 5.1.11);
- changed ?€?mobile construction sign?€? to ?€?mobile work sign?€? and changed it to a triangle shape (see 5.1.12);
- deleted "road closed sign", "lane closed sign", "vehicle slow sign" (see 5.1); Road traffic signs and markings - Part 4: Work zone
1 Scope
This Part of GB 5768 specifies the requirements for setting of road work zone?€?s traffic signs and markings.
This Part is applicable to the setting of traffic signs and markings for works such as construction and maintenance of roads, urban roads, and places, squares, public parking lots and other places that are under the jurisdiction of the organization but allow social vehicles. The settings of traffic signs and markings for works such as construction and maintenance of other places where motor vehicles pass can refer to this Part.
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, Road traffic signs and markings - Part 2: Road traffic signs GB 5768.3, Road traffic signs and markings - Part 3: Road traffic markings GB/T 18833-2012, Retroreflective sheeting for traffic control
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. 3.1 work zone
A section where traffic is controlled due to operations that affect traffic operation such as road construction, maintenance.
3.2 long-term work zone
A work area there the total time of setting up the work area, carrying out the work, and dismantling the work area is greater than 24h at one location. 3.3 short-term work zone
6 General provisions on work zone layout
6.1 The traffic signs, markings and other facilities in work zone are temporary facilities set during operation. After the completion of the operation, the original traffic signs, markings and other facilities shall be demolished and restored in time. See Annex B for other facilities.
6.2 When the traffic signs, markings and other facilities are set in work zone, it shall start from the warning zone and shall be pushed to the termination zone. The removal sequence shall be reversed from the setup sequence.
6.3 The width of the motorway adjacent to the work zone on the highway shall not be less than 3.0m, not less than 2.75m on the urban road; otherwise it shall close this lane.
6.4 In addition to mobile work, channeling facilities must be set up to separate the work zone and the traffic flow. When separating the oncoming traffic flow, it shall use mobile barriers. It can use plastic water injection (sand) barriers. When the conditions are not met, traffic cones, buckets or columns can be used. 6.5 The setting range of channeling facilities include upstream transition zone, buffer zone, operating zone and downstream transition zone. Place according to Figure 1. The spacing between traffic cones, traffic barrels, and traffic columns shall not be greater than 10m. Conduct appropriate encryption in the upstream transition zone. The work zone and the temporary work zone within the intersection of roads shall, according to the actual situation, simplify the setting of channelizing devices in the upstream transition zone, buffer zone and downstream transition zone.
6.6 In addition to the mobile work zone, the work zone shall set up traffic signs in the work zone according to the actual traffic organization:
a) The starting point of the warning zone shall be set with the distance sign of the working zone to predict the work zone location;
b) When the number of lanes in the work zone is reduced, the sign of
decrease number of lanes shall be set;
c) When the work zone borrows the opposite lane or access road, it shall set the sign of detour;
d) In the upstream transition zone, the sign of linear induction or of variable arrow signal shall be set according to the actual situation;
e) When the work zone is long, the starting point of the buffer zone shall be set with the sign of work zone length;
8.1.1 If necessary, a work zone distance sign can be added at upstream of the starting point of the warning zone. The distance from the starting point of the warning zone shall not exceed 500m.
8.1.2 When a single-lane highway occupies part of the road, it shall close the traffic or temporarily widen it.
8.2 Work zone borrows opposite lane
8.2.1 Prioritize traffic guidance personnel to direct the two-way traffic. 8.2.2 When both ends of the work section can be seen, if there are no traffic guidance personnel, it is advisable to set the sign of ?€?right of way?€? and the sign of ?€?give way?€? in the transition zones at both ends of work zone.
8.2.3 When the night work meets one of the following conditions, a temporary signal light can be set:
a) The length of the road that can only be passed in one way affected by work zone is greater than 30m;
b) The length of the road that can only be passed in one way affected by work zone is less than 30m and the oncoming vehicles cannot be seen
clearly.
8.3 Work zone is located at plane crossing
8.3.1 It is better to equip with traffic guidance personnel to guide traffic in four directions.
8.3.2 When the work zone is at an exit of an intersection, construction signs can be set at the entrances of other three directions. When the work zone is located in the center of the intersection, construction signs are set in all four directions.
8.3.3 When the work zone is located at the intersection exit, it can simplify the upstream transition zone and the buffer zone.
8.3.4 When the work zone is located at the intersection entrance, it can simplify the downstream transition zone.
8.4 Example of layout of work zone of two-lane and single-lane highways See Annex C for the example of layout of work zone of two-lane and single-lane highways.
C.2.2 When the closed inside lane of a four-lane expressway and arterial highway is working, see Figure C.2 for the example of work zone layout: a) At the starting point of warning zone, set a work zone distance sign to notice the work zone location in advance;
b) Near the midpoint of warning zone, set a sign of decrease number of lanes; c) It shall use plastic water injection (sand) barriers (or traffic cones, traffic barrels, traffic columns; movable guardrails, if possible) to surround the upstream transition zone, buffer zone, working zone and downstream
transition zone;
d) It can use hard shoulder to create another lane;
e) Mark out a dividing line to prohibit crossing the same-way vehicle lane in upstream transition zone, buffer zone, working zone and downstream
transition zone to mark the lanes for vehicles to pass and the closed traffic area. Forbit the dividing line that prohibits crossing the same-way vehicle lane to extend a distance before the upstream transition zone and behind the downstream transition zone. Prohibit vehicles from changing lanes.
Cooperate the dividing line that prohibits crossing the same-way vehicle lane to set guide arrows to guide vehicles the driving direction;
f) Before the starting point of upstream transition zone, set a speed limit sign of work zone. Complete the speed limit transition before upstream
transition zone;
g) Within the upstream transition zone, set linear induction signs or variable arrow signals according to vehicle driving direction;
h) At the starting point of buffer zone, set a work zone length sign to predict the work zone length;
i) Buffer zone repeatedly sets speed limit signs of work zone;
j) Set up road bars at the front end of working zone;
k) Set a work zone end sign at the end of termination zone to explain the end location of work zone;
l) Set a speed limit sign at the end of termination zone. The speed limit value is the original speed limit value of this section.
warning zone, set work zone distance signs to notice the work zone
location in advance;
b) Set a detour sign Figure 4a) near the midpoint of warning zone in closed direction. Set a sign of decrease number of lanes near the midpoint of
opposite warning zone;
c) It shall use plastic water injection (sand) barriers (or traffic cones, traffic barrels, traffic columns; movable guardrails, if possible) to surround the upstream transition zone and downstream transition zone in closed
direction. It shall set upstream transition zone for each closed lane;
d) Use channelizing devices to surround the opposite upstream transition zone and the opposite buffer zone. It can use movable guardrails when
conditions permit;
e) Two-way traffic flow sections shall use movable guardrails to separate; f) Mark out a dividing line to prohibit crossing the same-way vehicle lane before the convergence point in the upstream transition zone to form a
broken-solid line with the original marking to prompt that the vehicles on the occupied work lane to merge as soon as possible and the vehicles not on the occupied work lane are prohibited to change the lane. Cooperate
to set guiding arrows to guide vehicles to merge, indicate driving direction; g) Set two-way traffic signs near the starting point of opposite upstream transition zone;
h) Set work zone speed limit signs before starting points of closed direction upstream transition zone and opposite upstream transition zone.
Complete the speed limit transition before upstream transition zone;
i) Within the closed direction upstream transition zone and opposite
upstream transition zone, set linear induction signs or variable arrow
signals according to vehicle driving direction;
j) At the starting point of closed direction buffer zone and opposite buffer zone, set work zone length signs to notice the work zone length in advance;
k) The closed direction buffer zone and the opposite buffer zone repeatedly set work zone speed limit signs;
l) Set up road bars at the front end of working zone;
m) At the termination end of the borrowed opposite lane, set linear induction signs or variable arrow signals as well as guiding arrows to guide vehicles to drive back to the original lane;
C.2.5 When a six-lane expressway closes one direction to work and borrows the opposite lane to pass, the examples of work zone layout are as shown in Figure C.5, Figure C.6:
a) At the starting points of closed direction warning zone and opposite warning zone, set work zone distance signs to notice the work zone
location in advance;
b) Near the midpoint of closed direction warning zone, set a detour sign Figure 4a). Near the midpoint of opposite warning zone, set a sign of
decrease number of lanes;
c) It shall use plastic water injection (sand) barriers (or traffic cones, traffic barrels, traffic columns; movable guardrails, if possible) to surround the upstream transition zone, downstream transition zone in closed direction. Set upstream transition zone for each closed lane;
d) Use channelizing devices to surround the opposite upstream transition zone and the opposite buffer zone. Use movable guardrails when
conditions permit;
e) Two-way traffic flow sections shall use movable guardrails to separate; f) Mark out a dividing line to prohibit crossing the same-way vehicle lane before the convergence point in the upstream transition zone to form a
broken-solid line with the original marking to prompt that the vehicles on the occupied work lane to merge as soon as possible and the vehicles not on the occupied work lane are prohibited to change the lane. Cooperate
to set guiding arrows to direct vehicles to merge and indicate driving
direction;
g) Near the starting point of opposite upstream transition zone, set a two- way traffic sign;
h) Before the closed direction upstream transition zone and the opposite upstream transition zone, set speed limit signs of work zone. Complete
the speed limit transition before upstream transition zone;
i) Within the closed direction upstream transition zone and the opposite upstream transition zone, set linear induction signs and variable arrow signals according to vehicle driving direction;
j) At the starting points of closed direction buffer zone and opposite buffer zone, set work zone length signs to notice the work zone length in
advance;
k) The closed direction buffer zone and the opposite buffer zone repeatedly NOTE: Take the original speed limit of 100km/h as an example.
Figure C.6 -- Example of work zone layout of a six-lane expressway that closes one direction to work and borrows two opposite lanes to pass
C.2.6 When a six-lane expressway closes one direction to work and borrows a same-way access road to pass, see Figure C.7 for the example of work zone layout:
a) At the starting point of closed direction warning zone, set a work zone distance sign to notice the work zone location in advance;
b) Near the midpoint of closed direction warning zone, set a detour sign Figure 4c);
c) It shall use plastic water injection (sand) barriers (or traffic cones, traffic barrels, traffic columns; movable guardrails, if possible) to surround the upstream transition zone and the downstream transition zone. Set
upstream transition zone for each closed lane;
d) Mark out a dividing line to prohibit crossing the same-way vehicle lane before the convergence point in the upstream transition zone to form a
broken-solid line with the original marking to prompt that the vehicles on the occupied work lane to merge as soon as possible and the vehicles not on the occupied work lane are prohibited to change the lane. Cooperate
to set guiding arrows to guide vehicles to merge and indicate driving
direction;
e) Before the starting point of upstream transition zone in the closed direction, set a speed limit sign of work zone. Complete the speed limit transition before upstream transition zone;
f) Within the upstream transition zone in the closed direction, set linear induction signs and variable arrow signals according to vehicle driving direction;
g) Near the starting point of the access road, set a work zone length sign to notice the work zone length in advance. Repeatedly set the speed limit
sign of work zone;
h) At the end of termination zone, set an end sign of work zone to explain the end location of work zone;
i) At the end of termination zone, set a speed limit sign. The speed limit value is the original speed limit value of this section.
upstream transition zone, buffer zone, working zone and downstream
transition zone;
b) Set the followings for ramp vehicle service signs:
1) Set a construction sign before the confluence nose;
2) Set a speed limit sign near the junction. The speed limit value can be appropriately adjusted on the basis of the speed limit on the ramp;
3) Set linear induction signs and variable arrow signals according to
vehicle driving direction;
c) Set the followings for mainline vehicle service signs:
1) Set a work zone distance sign to notice the work zone location in
advance near the starting point of mainline warning zone;
2) Set a sign of decrease number of lanes near the midpoint of mainline warning zone;
3) Set a speed limit sign of work zone before the starting point of mainline upstream transition zone. Complete the speed limit transition before main- line upstream transition zone;
4) Within the mainline upstream transition zone, set linear induction signs and variable arrow signals according to vehicle driving direction;
5) Within the buffer zone, repeatedly set speed limit signs of work zone; 6) Set up road bars at the front end of working zone;
7) Set a sign of attention to confluence before the vehicle actual junction; d) At the end of termination zone, set a work zone end sign to explain the end location of work zone;
e) At the end of termination zone, set a speed limit sign. The speed limit value is the original speed limit value of this section.
b) Before two-way upstream transition zones, mark out a margin line to
prohibit crossing the opposite vehicle lane and to prohibit vehicles
overtaking;
c) Closed traffic direction signs set the followings:
1) Near the starting point of warning zone, set a work zone distance sign to notice the work zone location in advance;
2) Near the midpoint of warning zone, set a detour sign Figure 4a);
3) Before the starting point of upstream transition zone, set a speed limit sign of work zone. Complete the speed limit transition before upstream
transition zone;
4) Near the starting point of upstream transition zone, set a sign of give way;
5) With upstream transition zone, set linear induction signs or variable arrow signals according to vehicle driving direction;
6) Near the starting point of buffer zone, set a work zone length sign to notice the work zone length in advance;
7) Buffer zone repeatedly sets speed limit signs of work zone;
8) Set up road bars at the front end of working zone;
9) At the end of borrowed opposite lane, set linear...

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