Key Design of Direct Enforcement Inspection Stations for Road Overload Control
1. Introduction
Illegal overloading and overloading of trucks not
only destroys highways and bridge facilities, but also easily causes road
traffic accidents and endangers the safety of people's lives and property.
According to statistics, more than 80% of road traffic accidents caused by
trucks are related to oversized and overloaded transportation.
The traditional overrun and overloaded transportation checkpoint mode has
low law enforcement efficiency, which is easy to cause the phenomenon of
overrun vehicle omission, and the direct enforcement detection point control
mode relies on the dynamic automatic weighing and detection system to
automatically detect, identify and screen the passing vehicles around the
clock, so as to achieve accurate and efficient control of overrun and overloaded
vehicles. In order to strengthen the governance of overloaded transportation
behavior, ensure the safety of highway facilities and people's lives and
property, the direct enforcement system of road overrun has gradually been
fully promoted and applied in the highway, and the overrun control of highway
has achieved remarkable results, and the control of highway overrun rate has
been controlled within 0.5%, and the illegal overrun and overload of ordinary
highways have also been effectively curbed.
2. The framework of the direct enforcement system
2.1. Framework and functions of the governance system
The direct
enforcement mode refers to the automatic acquisition of relevant data such as
the weight of passing vehicles through high-speed and accurate dynamic weighing
equipment, so as to determine whether the freight vehicles are overloaded and
transported, and rely on scientific and technological means to obtain evidence,
and notify and deal with them afterwards.
The national network management information system is organized and
constructed by the Ministry of Transport, and the provincial system data is
connected and shared, providing support for the inter-ministerial and
inter-provincial business coordination, and effectively supervising the
national governance and super-governance work; The provincial-level project
shall be organized and constructed by the provincial (autonomous region,
municipal) transportation department to realize the functions of business management
and service within the jurisdiction, support the provincial, municipal and
county levels to carry out the work of inspection, and connect with the
ministry-level system.
Taking Zhejiang as an example, the province's networked
governance system adopts a four-layer structure and three-level management from
top to bottom, which are as follows:
1) Provincial governance platform
It plays the role of six major platforms in the
province's networked governance system, namely: basic data center platform,
data exchange platform, administrative punishment platform, one-time illegal
auxiliary judgment platform, assessment and evaluation platform and statistical
analysis and display platform. Connect with the provincial government service
network to obtain the matter database, discretionary database, and law
enforcement personnel database, and report administrative punishment handling information
in real time; Docking with the traffic police system to obtain freight vehicle
information and driver information, copy illegal overrun transportation
information; Docking with the transportation management system to obtain
information on transportation enterprises, freight vehicles, etc., and copying
illegal overrun transportation information; Unified document template and basic
information and blacklist/license management of the governance station; Realize
the auxiliary ruling of one penalty for one trip of oversized transportation;
Assess and evaluate the operation of the province's monitoring stations and the
operation of the super-control business; Through the statistics and analysis of
data, the province's policy of governance and super-governance is evaluated,
and quantitative support is provided for the introduction of the policy;
Provide relevant legal and regulatory support for the work of governance at all
levels, and establish a business database at the provincial, municipal, and
county levels.
2) Prefecture-level governance super module
Responsible for the comprehensive
management of basic business information within the jurisdiction, statistical
analysis of overrun information, law enforcement inspection of the local city,
administrative reconsideration of the case, business deployment, inspection and
evaluation of the local city.
3) District and county governance super module
Receive and store the data of
various overrun detection sites and facilities in the jurisdiction (including
all kinds of overrun detection data, pictures and videos).
Collect/review/confirm the illegal overrun data in the area, file archiving,
and relevant statistics, analysis and display in the district and county.
4) Direct enforcement inspection stations
Through the dynamic weighing and capture forensics
equipment set up on the road, the weight, license plate and other relevant
information of the passing truck are obtained.
2.2. Composition and function of direct enforcement system
The field equipment of the direct
enforcement system (see Figure 1) mainly includes automatic weighing and
detection equipment, vehicle capture and identification equipment, illegal
behavior notification facilities, video surveillance equipment, etc.
1) Weighing equipment: including
weighing sensors, weighing controllers (industrial computers), car
distributors, etc., should be verified by relevant qualified measurement
institutions, and the weighing results can be used as the basis for punishment.
2) High-definition recognition and
capture equipment: used to collect images of vehicles, including license
plates, body conditions, license plate numbers and colors that can identify
vehicles.
3) Video surveillance equipment:
the use of video surveillance equipment to obtain the process of automatic
weighing detection equipment for trucks, and the monitoring information
obtained by video surveillance equipment can be used as evidence.
4) Information release equipment:
through the variable information board, the vehicle that has been tested and
overrun can be issued in real time to overrun the notice, and guide the truck
driver to the nearest unloading site for unloading.
Figure 1. Diagram of the composition of the direct enforcement system
3. Design of direct enforcement detection
points
In order to
improve the effectiveness of overkill, direct enforcement inspection stations
should be selected in accordance with the principle of "overall planning
and unified layout", and priority should be given to roads with the
following characteristics:
1) Trucks are seriously overrun or trucks must pass
through the road;
2) roads connected to key protected bridges;
3) Provincial borders, municipal boundaries and
other administrative areas junction roads;
4) Rural roads that are easy for vehicles to detour.
Dynamic truck scale is an automatic weighing instrument used to measure the
longitudinal mass (gross weight), axle load, and axle group load when the
vehicle passes, and it mainly has load
The device, the data processing part and the display instrument are
composed, wherein the data processing part is usually designed in the form of a
control cabinet. According to the different carriers, dynamic truck scales can
be divided into vehicle type, axle load type, double platform type, axle group
type, multi-arrangement combination type, and flat plate type can also be
regarded as the category of axle group type. The working principle of the
carrier is to measure the electrical signal when the carrier bears the tire
load, and then convert it into the mass of the vehicle through amplification
and signal processing, which can be divided into two categories: strain gauge
type and quartz crystal type.
Under the condition of meeting the
requirements of detection accuracy, the appropriate dynamic truck scale should
be selected according to the road conditions, and the use of new technology
weighing equipment with high precision, low cost and in line with standards
should be encouraged, and the trucks that can be queued up and passed through
the non-stop weighing detection area can be accurately separated.
3.2.2. Deployment of outfield equipment
Figure 2 is a typical layout diagram of direct enforcement stations, and
Table 1 is the functional requirements of the main equipment. When the direct
enforcement detection point is set on a single pavement road, a dynamic truck
scale should be set on the entire road cross-section, and if the entire
cross-section cannot be set up due to conditions, isolation facilities such as
wrong-way driving and riding should be added to avoid vehicles evading
weighing.
Figure 2. Typical diagram of the direct enforcement station
Table 1.Key Device Functional Requirements
|
|
The name of
the device |
Key feature
requirements: |
|
1 |
Dynamic
truck scales |
It can automatically detect the time, number of axles,
speed, single axle axle load, total weight of vehicle and cargo, wheelbase
and other information of the vehicle; It can accurately separate the queuing
mode through the freight vehicle; It can deal with the abnormal driving state
of freight vehicles such as lane change and speed breaking; It can transmit
the front-end truck overrun information to the management system in real
time; It can meet the uninterrupted all-weather continuous work in the unattended
state; It should have a fault self-test function |
|
2 |
License plate recognition and capture equipment |
should be equipped with a fill light or flashing light;
It can clearly capture the license plate number, has environmental protection
configuration, and it is recommended to use a three-in-one fill light to
avoid light pollution; Ability to capture images of freight vehicle number
plates in full-frame JPG format; It should be able to capture 1
high-definition picture of the front, and according to the picture
information, it should be able to clearly distinguish the license plate area
of the freight vehicle, the front and cab features, and the color of the
front of the car; The vehicle identification and capture equipment should be
able to capture the image of the vehicle passing through the non-stop
weighing detection area from multiple angles from the side and tail, and
should be able to clearly distinguish the number of axles of the freight
vehicle, the color of the body, and the basic situation of the transported
goods according to the image information; Vehicle identification and capture
equipment should have fault self-inspection function; The abnormal event
capture device supports the detection function of abnormal vehicle crossing
and compaction line. |
|
3 |
Video
surveillance equipment |
Forensic images
should be at least 2 million pixels and should be tamper-proof. |
|
4 |
Information
Publishing Equipment |
It should be able to release the vehicle overrun
detection information to the driver of the overrun vehicle in real time, and
it should be able to realize text alternation, scrolling and other display
methods. |
When a vehicle is detected to be suspected of being
overloaded, the license plate will be displayed via a variable information
board and the vehicle will be directed to a nearby overloaded transport
checkpoint for processing. The setting distance between the information board
and the dynamic truck scale should meet the requirements of vehicle vision, and
it is recommended to choose the appropriate variable information board type and
setting distance according to the road conditions; When the distance between
the information board and the dynamic truck scale does not meet the driver's
visibility requirements due to the road alignment conditions, it is recommended
to limit the driving speed of the truck or adjust the angle of the information
board LED particles to improve the driver's visibility time.
3.3. Design of measures to reduce weighing errors
According to the requirements of overload division
in the penalty standard, in the case of running speed of 1~80km/h, the total
weight of the vehicle and cargo in the dynamic weighing should meet the
requirements of the accuracy level of 10, and the percentage of the agreed true
value of the total weight of the vehicle does not exceed the error of the first
inspection and subsequent inspection
± 5.00%, and the test error in use does not exceed ±10.0%.
In order to reduce the error
caused by pavement factors to weighing, the pavement in the area that affects
weighing before and after weighing equipment at direct enforcement stations
should meet the following requirements:
1) The longitudinal slope should
not be more than 2%, and the lateral slope of the pavement should not be more
than 2%;
2) when on the cement pavement, a
deformation joint, a tie rod and a filler are arranged between the backfill
cement concrete and the existing cement pavement;
3) When on the asphalt pavement, a gradient transition is adopted between
the backfill cement concrete and the existing asphalt surface course. Direction
enforcement station
selection points should avoid being installed on the
following road sections:
1) The road section within 200m from the level intersection;
2) the number of lanes changes in the road section;
3) overpass (aerodynamic influence) and approach bridge (poor uniformity)
sections;
4) sections of bridges or other structures that will have a dynamic impact
on vehicles;
5) Sections under or near radio transmission
stations and railway tracks under high-voltage power lines.
In addition, in order to reduce the weighing error caused
by the driving behavior of the vehicle, the following measures should be taken
in the weighing section:
1) When the driving lane is multi-lane, the roadway
dividing line adopts a solid line, and vehicles are prohibited from changing
lanes;
2) When the road section alignment is good and easy
to speed, set up the truck speed limit sign in front of the weighing detection
area;
3) In order to crack down on driving behaviors that
deliberately evade punishment such as blocking license plates, driving in the
wrong direction, and queuing and tailgating, illegal capture and identification
equipment can be added.
To sum up, the layout of direct enforcement
detection points should be comprehensively determined after comprehensively
considering the regional road network, road conditions and surrounding
environment, and the design of reducing errors should be carried out according
to the road conditions of the installation location to reduce the errors in the
operation and maintenance process. In order to reduce the cost of weigh-in-motion
construction, in addition to overall planning and reasonable selection of
layout points, it is also necessary to clarify the management authority,
coordinate the management from multiple departments and angles, and strive to
reduce overload behavior from the source.
Enviko Technology Co.,Ltd
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