• Title/Summary/Keyword: 주행위험성

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Suggestion of Delineators Considering Traffic Safety at Curve Sections (교통안전을 고려한 곡선부 시선유도시설물 제시에 관한 연구)

  • Kwon, Sung-Dae;Lee, Suk-Ki;Jeong, Jun-Hwa;Ha, Tae-Jun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.31 no.3D
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    • pp.403-412
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    • 2011
  • On a curve radius, there is speed deviation because a driver who is on the curve radius can have visual distortion. The curve radius can be more dangerous than a straight radius by many reasons. Especially, visibility paralysis of delineator that is because of night and bad weather. Can pervert the information about curve sections, it threatens safety. More over accident risk is increased by influence to travel speed. Therefore, it needs to build and control delineators for driver's visibility. Therefore, this study focus on finding the two types of delineator(the retro-reflection and inside-lighting delineator) by insight-surveying and the operating speed are compared by survey and operating speed. Finally, inside-lighting delineator will be selected in terms of safety at the curve sections. The inside-lighting delineator was more effective than the retro-reflection delineator on visibility, the necessity of reduction of speed and will reduce the hazard at curve sections. Also, the study analyzes safety is guaranteed by the slight reduction of speed when the driver enters a curve radius with inside-lighting delineator. As a result, the inside-lighting delineator can give the information about horizontal and vertical profile effectively, so it can reduce the accident risk. And it can use to improve traffic safety on curve radius.

Design of Autobike Driver's Driving Information and e-call Functions Providing Software using Smart Helmet (스마트헬멧을 이용한 오토바이 운전자 주행정보 및 e-call 기능 제공 소프트웨어의 설계)

  • Cho, Byung-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.17 no.4
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    • pp.173-179
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    • 2017
  • Autobike is insufficient of car navigation informations and high of accident dangerousness comparing to car. So if a system providing autobike driver's driving information and e-call function is developed using smart helmet consisting of collision perception sensor, rear camera, bluetooth communication module, MCU and HUD, It is very useful and can decrease of person's damage and handle expeditious traffic accident during autobike accident. In this paper, when this, "Providing system of autobike driver's information and e-call function", software is developed, a proper analysis and design method for practical affairs try to be presented due to showing software development analysis method, architecture of hardware block-diagram, flowchart and UI design.

A Study on the Determining Appropriate Truck and Commodity Types for V2X-based Truck Platooning (V2X 기반 군집주행을 위한 적정 화물차 및 품목 선정 기초연구)

  • Ryu, Seungkyu;Choi, Yoon-Hyuk;Jeong, Harim;Kwon, Bongkyung;Yun, Ilsoo
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.19 no.2
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    • pp.122-134
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    • 2020
  • To improve traffic congestion, reduce fuel consumption, and improve the stability of truck operations, truck platooning, in which several trucks are organized in a single platoon, is being actively researched globally. Compared to the operation of a single truck, the operation of a truck platoon requires more caution before the actual operation because an accident of one vehicle in the platoon can lead to an accident with all the vehicles in the platoon. Therefore, this study examined the types of trucks and cargo suitable for truck platooning to prevent safety accidents. The review showed that a closed-van-type truck is appropriate for truck platooning to prevent falling objects during driving. In the case of cargo types, it is necessary to exclude liquids and dangerous goods defined in related laws from truck platooning.

Integration of Visually Detected Lane Information into Costmap (비전 기반 차선 인식 정보의 Costmap 반영 연구)

  • Jihoon Ha;Kyunam Kim
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.11a
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    • pp.1135-1136
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    • 2023
  • 자율주행에서의 경로 계획을 위해서는 costmap을 활용할 수 있다. Costmap은 map 정보와 센서 데이터를 토대로 해당 지역을 통과할 때의 위험도를 cost로 할당한다. 그러나 local costmap에는 센서로 인식한 장애물만이 고려되며, 차선 정보를 경로 계획에 포함하기 위해서는 별도의 정보 처리가 필요하다. 본 연구에서는 카메라로 인식한 차선 정보를 costmap에 포함함으로써 통합적인 판단 방법론을 탐색하고, 위치 추정 및 경로 계획에서의 활용 가능성을 제시한다.

마모 타이어로 인한 교통사고의 분석 및 대책(상)

  • Korea Tire Manufacturers Association
    • The tire
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    • s.104
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    • pp.8-16
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    • 1983
  • 타이어가 마모되면 미끄러지기 쉬울뿐 아니라, 위험하다. 특히 과마모된 타이어가 젖은 노면을 주행하게 되면 ,정지거리가 길어지든가 또는 옆으로 미끄러지기 쉬우므로 위험하며, 또 타이어의 수상활주현상(Hydroplaning)이 일어나기 쉽다. 그러므로 본고에서는 날로 더해가는 교통량의 증가로 과마모타이어의 사용률이 늘어나게 됨으로써 교통사고와 직결되는 타이어의 위험부담을 조금이라도 줄여보고자 타이어로 인한 교통사고의 원인분석과 그 대책을 살펴본 것이다. 특히 본고에서는 일본의 전국 교통사고분석관회의에서 발표된 보고서의 자료를 인용하여 마모타이어와 교통사고의 연관성을 분석해 본 것이다. 따라서 본자료는 처음부터 완전한 것은 아니며 앞으로도 계속 연구할 필요가 있을 것으로 보며, 이 기회에 관련업체는 물론, 관계기관에서도 마모타이어로 인한 사고를 미연에 방지할 수 있는 적극적인 대책을 강구해 줄 것을 진심으로 바라는 바이다.<편자 주>

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A Relay Node Selection Algorithm for Inter-Vehicle Emergency Message Broadcasting (차량간 긴급 메시지 브로드캐스팅을 위한 릴레이 노드 선정 알고리즘)

  • Kim, Tae-Hwan;Kim, Hie-Cheol;Hong, Won-Kee
    • Proceedings of the Korean Information Science Society Conference
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    • 2006.10d
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    • pp.205-210
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    • 2006
  • 차량간 무선통신을 이용한 긴급메시지 전파는 도로 주행 중에 발생할 수 있는 도로의 결빙, 낙석, 공사, 안개, 급커브 등의 위험 상황을 사전에 신속히 위험 지역의 차량들에게 알려 위험 상황 대처 능력을 크게 개선 할 수 있다. 그러나 차량간 통신은 일반적인 무선통신과 달리 노드의 고속 이동성, 노드 밀도, 네트워크 토폴로지의 빈번한 변화와 같은 차량 환경 고유의 특징을 가진다. 본 논문에서는 차량간 긴급메시지를 신속하게 전달하기 위한 시간예약 기반 릴레이 노드 선정 알고리즘을 제안하였다. 실험결과, 제안한 알고리즘이 거리 기반 릴레이 노드 선정 알고리즘에 비해 네트워크 부하와 전달 지연시간에서 25% 성능 향상을 보였으며, 낮은 노드 밀도에서는 더욱 우수한 성능을 보였다.

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Design and Implementation of Space Adaptive Autonomous Driving Air Purifying Robot for Green Smart Schools (그린 스마트 스쿨을 위한 공간 적응형 자율주행 공기청정 로봇 설계 및 구현)

  • Oh, Seokju;Lee, Jaehyeong;Lee, Chaegyu
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.22 no.1
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    • pp.77-82
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    • 2022
  • The effect of indoor air pollution on the human body is greater and more dangerous than outdoor air pollution. In general, a person stays indoors for a long time, and in a closed room, pollutants are continuously accumulated and the polluted air is better delivered to the lungs. Especially in the case of young children, it is very sensitive to indoor air and it is fatal. In addition, methods to reduce indoor air pollution, which cannot be ventilated with more frequent indoor activities and continuously increasing external fine dust due to Covid 19, are becoming more important. In order to improve the problems of the existing autonomous driving air purifying robot, this paper divided the map and Upper Confidence bounds applied to Trees(UCT) based algorithm to solve the problem of the autonomous driving robot not sterilizing a specific area or staying in one space continuously, and the problem of children who are vulnerable to indoor air pollution. We propose a space-adaptive autonomous driving air purifying robot for a green smart school that can be improved.

Characteristics of the Rollover Critical Speed of a Trailer Equipped with a Tilting System (틸팅 시스템을 장착한 트레일러의 전복임계속도 특성)

  • Jeong, Tae-Gun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.2
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    • pp.64-70
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    • 2018
  • Rollover is a major concern for vehicles with a higher center of gravity and for improving driving performance. This study investigates a tilting system to prevent rollover, which was successfully implemented for high-speed trains. It may be useful to apply the concept of the tilting system to a large truck such as a trailer. Even a small adjustment in the tilting angle can improve the driving stability during a steep turn. The equation of motion was derived from a dynamic model of the trailer with the tilting system. The balance of the centrifugal force and normal force determines the rollover critical speed for a given radius of the turn and load. To obtain a more conservative criterion, the rollover critical state was defined as the instant when any side wheel loses contact with the road. To actuate the tilting system, the optimal tilting angle must be calculated from the steering angle and the vehicle speed. Using a simplified model of a large truck, the effects of the tilting angle and load on the rollover critical speed were investigated.

Development of Traffic Prediction and Optimal Traffic Control System for Highway based on Cell Transmission Model in Cloud Environment (Cell Transmission Model 시뮬레이션을 기반으로 한 클라우드 환경 아래에서의 고속도로 교통 예측 및 최적 제어 시스템 개발)

  • Tak, Se-hyun;Yeo, Hwasoo
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.15 no.4
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    • pp.68-80
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    • 2016
  • This study proposes the traffic prediction and optimal traffic control system based on cell transmission model and genetic algorithm in cloud environment. The proposed prediction and control system consists of four parts. 1) Data preprocessing module detects and imputes the corrupted data and missing data points. 2) Data-driven traffic prediction module predicts the future traffic state using Multi-level K-Nearest Neighbor (MK-NN) Algorithm with stored historical data in SQL database. 3) Online traffic simulation module simulates the future traffic state in various situations including accident, road work, and extreme weather condition with predicted traffic data by MK-NN. 4) Optimal road control module produces the control strategy for large road network with cell transmission model and genetic algorithm. The results show that proposed system can effectively reduce the Vehicle Hours Traveled upto 60%.

An Analysis on the Prevention Effects of Forward and Chain Collision based on Vehicle-to-Vehicle Communication (차량 간 통신 기반 전방추돌 및 연쇄추돌 방지 효과 분석)

  • Jung, Sung-Dae;Kim, Tae-Oh;Lee, Sang-Sun
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.10 no.4
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    • pp.36-43
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    • 2011
  • The forward collision of vehicles in high speed can cause a chain collisions and high fatality rate. Most of the forward collisions are caused by insufficient braking distance due to detection time of driver and safe distance. Also, accumulated detection time of driver is cause of chain collisions after the forward collision. The FVCWS prevents the forward collision by maintaining the safety distance inter-vehicle and reducing detection time of driver. However the FVCWS can cause chain collisions because the system that interacts only forward vehicle has accumulated detection time of driver. In this paper, we analyze forward and chain collisions of normal vehicles and FVCWS vehicles on static traveling scenario. And then, we analyze and compare V2V based FVCWS with them after explaining the system. The V2V FVCWS reduces detection time of driver alike FVCWS as well as remove accumulated detection time of driver by broadcasting emergence message to backward vehicles at the same time. Therefore, the system decrease possibility of forward and chain collisions. All backward normal vehicles and 3~4 backward FVCWS vehicles have possibility of forward and chain collisions in result of analysis. However V2V FVCWS vehicles almost do not chain collisions in the result.