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THE
MINISTRY OF TRANSPORT OF VIETNAM
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SOCIALIST
REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
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No.
06/2024/TT-BGTVT
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Hanoi,
March 31, 2024
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CIRCULAR
NATIONAL
TECHNICAL REGULATION ON EXPRESSWAY
Pursuant to the Law on Road
Traffic dated November 13, 2008;
Pursuant to the Law on Technical
Regulations and Standards dated June 29, 2006;
Pursuant to Decree No.
127/2007/ND-CP dated August 01, 2007 of the Government elaborating the Law on
Technical Regulations and Standards;
Pursuant to Decree No. 78/2018/ND-CP
dated May 16, 2018 of the Government on amendment to Decree No. 127/2007/ND-CP;
Pursuant to Decree No. 56/2022/ND-CP
dated August 24, 2022 of the Government on functions, tasks, powers, and
organizational structures of Ministry of Transport;
At request of Director of Science
- Technology and Environment Department and Director of Vietnam Expressway
Authority;
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Article 1. The National
Technical Regulation on Expressway is attached hereto.
Number QCVN 115:2024/BGTVT.
Article 2. Entry into force
1. This Circular comes into force
from October 01, 2024.
2. Transition clauses
a) Investment projects for the
construction of expressways having their investment guidelines approved before
the effective date hereof shall adhere to regulations applicable as of the date
on which the investment guidelines are approved;
b) In respect of expressways with
maximum design speed of 80 km/h that are active before the effective date
hereof, for the purpose of upgrade and expansion, technical factors can be
applied to projects approved before the effective date hereof.
Article 3. Chief of Ministry
Office, Chief of Ministry Inspectorate, directors, Director of Vietnam
Expressway Authority, Director of Directorate for Road of Vietnam, heads of
relevant agencies, entities, and individuals are responsible for the
implementation of this Circular./.
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PP.
MINISTER
DEPUTY MINISTER
Nguyen Duy Lam
QCVN 115:2024/BGTVT
NATIONAL
TECHNICAL REGULATION ON EXPRESSWAY
Foreword
The QCVN 115:2024 “National
Technical Regulation on Expressway” is compiled by the Vietnam Expressway
Authority, Approved by the Science - Technology and Environment Department,
appraised by the Ministry of Science and Technology, and promulgated by the
Ministry of Transport under Circular No. 06/2024/TT-BGTVT dated March 31, 2024.
Table
of contents
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2. TECHNICAL PROVISIONS
3. ORGANIZING IMPLEMENTATION
NATIONAL
TECHNICAL REGULATION ON EXPRESSWAY
1. GENERAL
PROVISIONS
1.1 Scope
This Regulation prescribes
technical requirements and management requirements in construction, management,
operation, usage, and maintenance of expressways (excluding urban expressways).
1.2 Regulated entities
This Regulation applies to
organizations and individuals relevant to the investment, construction,
management, operation, usage, and maintenance of expressways.
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Design speed of expressway is
divided into 3 bands:
The 120 band has design speed of
120 km/h;
The 100 band has design speed of
100 km/h;
The 80 band has design speed of 80
km/h; a design speed of 60 km/h is allowed in areas with harsh terrain
conditions or areas under restriction of national defense and security;
An expressway may consist of
segments with varying speed bands as long as each segment lasts at least 15 km
in length and differences in design speed of two adjacent segments do not
exceed 20 km/h. Where an expressway is subject to more than one band (20 km/h),
a transition segment of at least 2 km in length with intermediate design speed
is required.
1.4 Reference documents
Reference documents used in this
document include:
- QCVN 41: 2019/BGTVT “National
Technical Regulation on Traffic Signs and Signals’’.
- QCVN 43: 2012/BGTVT “National
technical regulation on Roadside Station”.
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- QCVN 66:2013/BGTVT “National
Technical Regulation on Highway Weigh Station”.
- QCVN 02:2022/BXD “National
Technical Regulation on Physical Natural and Climatic Data for Construction”.
1.5 Definitions
In the Regulation, the terms below
are construed as follows:
1.5.1 Expressway
Refers to a technical grade of
roads for use by motorized vehicles, outfitted with median strips separating
opposing directions of travel, not accommodating at-grade crossing with other
road or roads, outfitted with adequate equipment, accommodating continuous,
safe traffic, shortening travel time, and allowing entry, exit at designated
locations.
1.5.2 Design speed
Refers to velocity values that
serve the calculation and selection of technical indicators of expressway.
1.5.3 Operating speed limit
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1.5.4 Breakdown lane
Refers to a lane that serves as
temporary parking space for accident-stricken vehicles, accommodates operation
of rescue vehicles and where other vehicles are prohibited from operating on
and parking on except for priority vehicles.
1.5.5 Design vehicle flow
Refers to number of cars equivalent
derived from the number of other vehicles passing through a cross section over
a unit of time in the future year. The future year refers to the 20th
year from the year in which expressway construction is expected to finish.
2. TECHNICAL
PROVISIONS
2.1 General requirements
2.1.1 Structure of
expressway must meet integrity and stability requirements and conform to
natural conditions.
2.1.2 Expressway contains at
least 4 lanes (2 lanes per direction of travel) and is outfitted with
continuous breakdown lanes (except where: the expressway crosses a bridge with
at least 150 m in span or 50 m in pier height; the expressway travels in
tunnel; deceleration and acceleration lanes are located on the expressway;
climbing lanes are located on the expressway).
2.1.3 Structures attached to
expressway include: Traffic management and coordination center; Roadside
stations; Stop-less electronic tolling system; Weigh stations; Barriers.
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2.2 Cross-section of expressway
2.2.1 Number of lanes is
determined on the basis of design vehicle flow and is at least 2 lanes per
direction of travel. Width of a lane is at least 3,75 m for band 120, band 100
expressways and at least 3,50 m for band 80 expressways.
2.2.2 Width of breakdown lanes
is at least 3,00 m for band 120 and band 100 expressways and at least 2,50 m
for band 80 expressways.
2.2.3 Median strip
2.2.3.1 Median strips
(consisting of medians and safety strips on both side of the medians) are
required to separate two directions of travel where cross-section of the
expressway rests on the same road base. Width of safety strips is at least 0,75
m for band 120 and band 100 expressways and at least 0,50 m for band 80 expressways.
Median strips are designed so to meet safety requirements.
2.2.3.2 Where two directions
of travel are situated on two separate road bases without median strips, safety
strips and earthen strips shall be required to the left of the direction of travel.
Width of safety strips is at least 1,00 m for band 120 and band 100 expressways
and at least 0,75 m for band 80 expressways.
2.2.4 Width of earthen
strips is at least 0,75 m; grass or other surface covering materials are used
to prevent erosion.
2.3 Cross-section of expressway
bridge and tunnel
2.3.1 Cross-section of
expressway segments on bridges must contain all elements similar to that of the
main segment. Where bridge span is at least 150,00 m in length or bridge pier
is at least 50,00 m in height and breakdown lanes are not available, a
transition segment from expressway cross-section tapered towards the bridge
segment is required.
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2.3.2.1 Cross-section of expressway
segments in tunnels must have sufficient width to accommodate all elements similar
to those in main expressway segments including footpaths (for maintenance and
evacuation purposes). Where expressway segments in tunnels do not accommodate
breakdown lanes, safety strips whose width conforms to design speed of the
expressways are required.
2.3.2.2 Where expressway
segments in tunnels are at least 1000,00 m in length and do not accommodate
breakdown lanes, an emergency refuge area of a minimum length of 30,00 m and
minimum width conforming to design speed of expressways is required every
500,00 m in expressway length or less.
2.4 Minimum clear height of
expressway is 5,00 m.
2.5 Collector road and
frontage road are required to accommodate travel demands of inhabitants living
in areas affected by and separated by expressways.
2.6 Geometric elements of
expressway
2.6.1 Geometric elements of
expressways must meet requirements detailed under Schedule 1 below:
Schedule
1 - Limit design parameters of contour maps and longitudinal sections
No.
Parameter
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Design
speed band (km/h)
1
Design speed Vtk
km/h
120
100
80
2
Maximum superelevation gradient isc
not greater than
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8
8
8
3
Minimum radius Rmin corresponding
to isc = + 8%
m
650
450
240
(140)
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Radius corresponding to isc
= + 2%
m
3000
2000
1300
(700)
5
Minimum radius not requiring
superelevation isc = -2%
m
5500
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2500
(1500)
6
Minimum length of transition
curve corresponding to Rmin
m
210
210
170
(150)
7
Minimum stopping sight distance
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210
160
110
(75)
8
Maximum uphill gradient
%
4
5
6
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maximum downhill gradient
%
5,5
6
6
10
Limit minimum radius of
summit-type vertical curve
m
12000
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3000
(1500)
11
Regular minimum radius of
summit-type vertical curve
m
17000
10000
4500
(2000)
12
Limit minimum radius of
valley-type vertical curve
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4000
3000
2000
(1000)
13
Regular minimum radius of
valley-type vertical curve
m
6000
4500
3000
(1500)
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Limit minimum length of vertical
curve
m
100
85
70
(50)
15
Regular minimum length of vertical
curve
m
250
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170
(120)
1. Values contained in brackets
correspond to a design speed of 60 km/h.
2. Length of transition curve
must be calculated so to ensure safety and convenience. Transition curve is
not required where superelevation is not necessary.
2.6.2 Visibility for
vehicles operating on expressways must be guaranteed.
2.6.3 Regulations on
longitudinal slope
2.6.3.1 Maximum longitudinal
gradient is specified under Schedule 1 and depends on design speed band.
2.6.3.2 Minimum longitudinal
gradient of cut and fill road base segments must be 0,50 %.
2.6.3.3 Minimum longitudinal
gradient of transition segments where lateral gradient is less than 1,00 % must
be 0,50 %.
2.6.3.4 Minimum longitudinal
gradient of expressway segments in tunnels is 0,30 %.
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2.7 Grade-separated junction, expressway
exits and entries
2.7.1 Grade-separated
junctions are required where expressways intersect other types of road.
2.7.2 Where expressway is
above other roads, clear height corresponding to technical grade of the roads
below must be guaranteed (taking into account future planning).
2.7.3 Minimum distance
between connected grade-separated junctions and expressway entries, exits is
4,00 km. Minimum distance between connected grade-separated junctions is 10,00
km or 5,00 km where these junctions are close to major cities, major urban
areas, and important functioning areas.
2.7.4 Technical
specifications applying to connected grade-separated junctions and expressway
entries, and exits.
2.7.4.1 Design speed of
branching roads within range of connected grade-separated junctions is
specified under Schedule 2 below.
Schedule
2 - Design speed of branching roads within range of connected grade-separated
junctions
Characteristics
of connected grade-separated junctions
Design
speed band (km/h)
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100
80
Connecting expressways with other
expressways and level I, level II roads
80
÷ 50
70
÷ 40
60
÷ 35
(50 ÷ 35)
Connecting expressways with other
roads
60
÷ 35
50
÷ 35
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Values contained in brackets
correspond to a design speed of 60 km/h.
2.7.4.2 Geometric elements
of branching roads within range of connected grade-separated junctions (radius
of curve, transition curve, superelevation, extension degree, longitudinal
gradient, vertical curve, sight distance) must meet requirements corresponding
to design speed.
2.7.5 Deceleration and
acceleration lanes are situated where appropriate on expressway entries and
exits.
2.8 Surface and base of
expressway
2.8.1 Road base
2.8.1.1 Road base must be
stable, capable of retaining geometric dimensions, sufficiently strong to
withstand vehicular load and natural factors throughout its useful life.
2.8.1.2 Road base must be
calculated, designed, and built on the basis of topographic, geological, and
hydrographic surveying data.
2.8.2 Road surface must be
designed and built in a way that meets strength, integrity, grip, evenness, and
drainage requirements.
2.9 Safety and protection on
expressway
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2.9.1.1 Traffic safety
system must be arranged in a synchronous manner on expressways.
2.9.1.2 Guardrails are
required to prevent people, livestocks, and wild animals from crossing
expressways.
2.9.2 Warning systems must
be installed on expressways in a manner that adheres to national technical
regulation on road warning.
2.9.3 Directional road
markings and guardrails or traffic cones are required to maintain safety in
operation.
2.9.4 Glare protection
2.9.4.1 Anti-glare measures
are required to negate light emitted by headlamps of opposing vehicles at
night.
2.9.4.2 Visibility in curves
must be inspected where anti-glare measures have been installed.
2.9.4.3 Where median strip
of expressway is at least 12,00 m in width, anti-glare measures are not
required.
2.9.5 Illumination is
required in the following areas on expressway:
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2.9.5.2 Tunnels.
2.9.5.3 Within range of
connected junctions on expressways.
2.9.6 Noise barriers are
required in areas adjacent to residential areas.
2.10 Management, operation,
usage, and maintenance of expressway structures
2.10.1 The management,
operation, usage, and maintenance of expressway structures shall conform to Decree
No. 32/2014/ND-CP dated April 22, 2014 of the Government and guiding Circulars.
2.10.2 Speed limit on
expressway is determined on the basis of design speed, technical conditions,
weather conditions, climate, vehicle flow, and type of vehicles participating
in traffic on expressway.
2.10.3 Maximum speed limit
on expressway must not exceed 120 km/h. Maximum speed limit and design speed
must not be more than 20 km/h apart; maximum speed limit of 2 consecutive
segments must not bee more than 20 km/h apart.
2.10.4 U-turn areas are
required for oversized vehicles in weigh stations.
3. ORGANIZING
IMPLEMENTATION
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3.2 In respect of connected
junctions, expressway entries and exits serving socio-economic development of
the area do not meet minimum separation distance mentioned under 2.7.3 hereof,
the Ministry of Transport shall consider projects under their management and
projects under management of local government at request of local government.
3.3 Investment,
construction, management, operation, usage, and maintenance of expressways
shall adhere to this Regulation.
3.4 Where documents referred
to in this document are replaced or amended, the new versions shall prevail./.