• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.16 no.4
• /
• pp.132-152
• /
• 2017

Network performance measure has been more and more important in transportation sector because traffic congestion has been steadily increasing in urban area. VKT is defined a sum of traveled distances of whole vehicles on the road network and one of the most important measure of effectiveness (MOE) for network performance measure. This paper aims to propose a methodology for estimating VKT and to apply it to calculate VKT in 6 major cities in Korea. We calculate VKT in 6 major cities by estimating traffic volumes on the uncollected road sections using regression kriging. It is expected that the proposed methodology can be applied various cities.

• Journal of the Korea Society of Computer and Information
• /
• v.4 no.2
• /
• pp.95-104
• /
• 1999

With the increasing of cars, general studies of them for the traffic safety have been raised as important problems. Visual system to radio-controled driving is to sample road traffic information as reconstructing a model from lots of road traffic information which is successively input in order to drive on unknown road. This paper proposes a sampling process of the road traffic information board needed in automatic driving under automatic drive system using Hough Transform and Genetic Alorithm.

• 한국도로학회지:도로
• /
• v.19 no.4
• /
• pp.66-75
• /
• 2017

• The tire
• /
• s.13
• /
• pp.5-11
• /
• 1968

도로사정의 개선에 따라 우리 나라의 자동차 사용조건은 저속, 과적, 험로라고 일컬어지는 한국적인 조건에서 고속, 정량적재 및 포장도로의 서구조건으로 이행하고 있으며 특히 최근에 경부간 고속자동차도로가 일부 착수되고 있다. 이 도로의 설계속도는 80km~120km의 고속으로서 종래 험로에만 대부분 주행해 왔던 우리 나라의 타이어는 고속이란 새로운 사용조건을 맞이하게 되었다. 여기서는 주로 고속타이어의 성능 및 고속을 극복할 수 있는 타이어의 성능에 대하여 개괄적으로 설명키로 한다.

• International Journal of Highway Engineering
• /
• v.13 no.3
• /
• pp.139-146
• /
• 2011

Travelling vehicles on roads may slip or overturn due to strong cross wind. This paper presents the path deviation equation and the overturning equation of vehicle, and the process of evaluating the cross wind risk. Case studies for cars and trucks are carried out. It explains the mechanism why the deviation occurs according to the types of vehicles. It shall help to prepare the measures for reducing the risk of travelling vehicles in high wind speeds.

• Journal of KSNVE
• /
• v.5 no.2
• /
• pp.158-162
• /
• 1995

자동차의 소음은 차실내 소음과 차외소음의 두가지로 나눌 수 있는데 소음은 자동차에 탑승하고 있는 사람들이 감성적으로 느끼는 것이어서 차량의 상품성에 직접적인 영향을 미치므로 자동차 제작자는 보다 더 정숙한 차실내 분위기를 만들기 위하여 자율적이 노력을 게을리 하지 않는 분야이며, 차외 소음은 산업화와 경제적 성장에 따른 자동차 수의 증가로 인하여 도로교통 소음에 크게 기여하므로 각국 정부 는 법률로써 이를 규제하고 있다. 소음을 포함한 환경오염 방지에 대한 관심이 고조 되는 가운데 도로 주변에서의 도로교통 소음은 주민의 일상생활 및 주게에 점점 더 크게 영향을 주게 되어, 국민이 소음측면에서 보다 더 편안한 생활을 할 수 있도록 정부는 가속주행소음, 배기소음, 경적소음 등 자동차로 기인하는 소음의 수준을 낮추고자 노력하여 왔다. 이 글에서 법규의 규제를 받고 있는 자동차로 기인하는 소음 중 도로교통소음에 기어가 큰 주행상태의 자동차 소음저감을 목표로 하는 가속 주행 소음 규제와 그 대책을 기술하였다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.2
• /
• pp.595-601
• /
• 2018

The era of autonomous vehicles, which drive themselves and in whose operation the driver does not intervene, is fast approaching. The safety of autonomous vehicles can be guaranteed only if they recognize the road infrastructure. However, the road infrastructure consists of road safety facilities, traffic operation systems, and cross-sectional concerns, which include a variety of components, such as types, shapes, and sizes. Therefore, it is necessary to prioritize the road information. This study was conducted to select the priority with which the road infrastructure attributes should be acquired using the AHP (Analytical Hierarchy Process) method. The road infrastructure attributes were categorized into 2 levels, levels 1 and 2, which consisted of 3 and 26 types of attributes, respectively. As a result of the AHP analysis, it was found that the highest priorities of the road infrastructure are the road safety facilities, traffic operation systems and cross sectional concerns. Also, in level-2, the priorities of the safety barriers (road safety facilities), traffic signals (traffic operation systems), and the median (cross sectional) are the highest. Also, this study provides application examples of road infrastructure extraction with the Point Cloud. The results are expected to support the recognition of technology for autonomous vehicles.

• 한국도로학회지:도로
• /
• v.19 no.4
• /
• pp.14-18
• /
• 2017

• 한국도로학회지:도로
• /
• v.16 no.4
• /
• pp.5-13
• /
• 2014

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.22 no.5
• /
• pp.148-162
• /
• 2023

The objective of this study is to derive the appropriate perception location for changes in driving behavior of autonomous vehicles in urban road environments based on traffic safety signs. For this purpose, 32 types of signs that induce changes in driving behavior were selected from currently used traffic safety signs and classified as three types according to changes in driving behavior. Based on this, three scenarios were designed: stop, speed change, and lane change scenarios. These were used to confirm the impact on traffic flow. As a result of the analysis, it was found that each scenario needs to receive information on traffic safety signs in advance to ensure changes in traffic flow and safety. Consequently, the appropriate perception location can be used as a basis for establishing standards for delivering message sets to autonomous vehicles or revising traffic safety signs for them. In addition, this study is expected to contribute to the establishment of safe and efficient driving strategies on urban roads as autonomous vehicles are introduced in the future.