Earticle

본 연구는 자율주행자동차 실증 테스트의 현실적 제약을 극복하고 불규칙적인 교통류를 반 영하기 위해 실제 AV와 가상 시뮬레이션(CarMaker, VISSIM)을 실시간 Co-simulation 방식으로 통합한 VILs 테스트 방안을 제안하고 실증 테스트를 통한 검증을 수행하였다. 테스트는 단속 류·연속류 시나리오에 대해 교통량과 무작위 시드를 조합한 반복 실험을 수행하였다. 각 시나 리오에서의 AV 주행 결과를 확인하고 실제 AV와 가상 AV의 속도에 대해 MAE, MSE, RMSE, R²로 검증하였다. 검증 결과, 대부분 조건에서 낮은 오차와 높은 설명력을 보여 유효성이 확인 되었다. 본 연구 결과는 AV 실증 테스트 과정에서 비정형 교통류와의 상호작용을 통해 기존 VILs의 한계를 개선하여 자율주행자동차의 실용적 검증을 위한 새로운 접근 방법으로서 향후 관련 연구의 기반을 제공할 것으로 기대된다.

This paper proposes a VILs testing approach that integrates a real autonomous vehicle with a virtual traffic environment in real time via co-simulation using CarMaker and VISSIM. This approach aims to overcome the practical constraints of field validation and reflect irregular traffic flows. Validation was conducted through repeated experiments combining various traffic volumes and random seeds under interrupted-flow and continuous-flow scenarios. The AV driving outcomes in each scenario were evaluated by comparing the real and virtual vehicle speed profiles using, and the coefficient of determination R². The results revealed low errors and high explanatory power under most conditions, confirming the effectiveness of the proposed framework. These findings suggest that this approach can meaningfully extend conventional VILs by better capturing the interactions with non-deterministic surrounding traffic during empirical AV testing. This framework is expected to provide a foundation for future research as a novel approach for practical validation of autonomous vehicles.

An Area Radiation Monitoring System (ARMS) ionization chamber, which had an 11.8 L active volume, was fabricatedand performance-tested at KAERI. Low leakage currents, linearities at low and high dose rates were achieved fromperformance tests. The correlation coefficients between the ionization currents and the dose rates are 1 at high dose rateand 0.99 at low dose rate. In this study, an integration-type ARMS ionization chamber was tested over a year for anevaluation of its long-term stability at a radioisotope (RI) repository of the Young-gwang nuclear power plant. The standarddeviation of dose rate of 1 day data and over a 100-days mean value were 6.2 µR/h and 2.9 µR/h, respectively. Thefabricated ARMS ionization chamber showed stable performance from the results of the long-term tests. Design andperformance characteristics of the fabricated ionization chamber for the ARMS from performance-tests are also addressed.

This article reviews the recent activities of field testing and application of superconducting fault current limiters (SFCL) based on high-temperature superconductors (HTS). The review particularly focuses on the trends in the field tests in terms of the technical aspects and commercial activities of the SFCLs. Stimulated by the discovery of HTS, numerous research and development activities have been conducted worldwide for SFCLs operating from distribution voltages to transmission voltages. Different types of SFCLs have been developed and field-tested. Consequently, more than 20 field tests and applications have been performed on real grids worldwide while supplying electric power to the customers. These field tests have not only provided the track records of the operation experiences including the problems and maintenance during operation, but also proved their current limiting capabilities against real faults, rendering this new technology highly viable. Through these activities, the following trends in the status of field testing and application are observed. Resistive-type SFCLs with HTS-coated conductors were dominantly used in the most recent field tests. This implies that the resistive type is technically more mature than the other types. Bus-bar coupling and transformer feeders were the major application locations. It is of importance that most of the field applications were conducted as R&D projects. A relevant change from the R&D stage to the application stage is shown as recently deployed SFCLs are expected to be under long-term operation and commercial service. Here, we review the installation of these SFCLs by substation. This review also discusses the recent activities for their commercial applications.

A field-specific essay test was developed as an attempt to improve the ESL placement procedure for international graduate students at the University of Illinois at Urbana-Champaign (UIUC). Graduate departments were classified into four areas, business, humanities/social sciences, technology and life sciences, and a set of four input prompts, and writing questions was developed. A total of 124 volunteers participated in taking both the regularly-required general-topic test and the field-specific test. A total-group FACETS analysis of the students’ performance on the two tests showed that they performed better on the field-specific test. However, subgroup analyses showed the field-specific topic effect only in the business and life sciences subgroups, while no prompt effect was found for the humanities/social sciences and technology subgroups. Considering that early in the test development procedure, these results were predicted by in a prompt evaluation session, the results suggest that more effort should be exerted to carefully select the topic and content of prompts in order to secure equivalency of the topic effect across all disciplinary groups. This paper further addresses limitations and promising research directions.

OBJECTIVES : A fog generated field test was conducted to analyze the relationship between different sizes of variable speed limit signs and the legibility distance under various fog density conditions. By using this study, appropriate sizes of signs can be selected depending on the density of fog. METHODS : An actual tunnel was selected as the area for this test, as other places cannot maintain the fog condition because of rapid air current. A total 121 subjects were recruited for this test, which took place over the course of four days. The test on the first day was conducted under normal weather conditions for comparison. Visibility-distance detecting sensor was used to measure the visibility distance due to the fog density time, simultaneously with the evaluation of legibility distance by subjects. RESULTS : The test results show the relationship between the different sizes of signs and the legibility distance corresponding to the visibility distance due to both non-fog and fog generated conditions. According to the technical test results, appreciable amount of reduction in legibility distance due to fog was resulted in all sizes of signs. Moreover, the legibility distance is reduced proportionately with the decrease in the visibility distance due to fog. CONCLUSIONS : The results of this study can be used to select appropriate sizes of valuable speed signs under fog conditions. Hence, drivers can expect to have more room to respond to adverse weather conditions, thereby reducing the risk of accidents.

OBJECTIVES : A fog generated field test was conducted to analyze the relationship between the luminance of variable speed-limit signs and the legibility distance under various fog density conditions. By using this study, appropriate luminance values can be selected depending on the density of fog. METHODS : An actual tunnel was selected as the area to conduct the test, as other places cannot maintain the fog condition because of rapid air current. Ninety-two subjects were recruited for this test, which took place during the course of three days. Visibility-distance detecting sensor was used to measure the visibility distance due to the fog density time, simultaneously with the evaluation of legibility distance by subjects. RESULTS : The test results show the relationship between luminance values and the legibility distance corresponding to the visibility distance due to fog. According to the technical test results, lower luminance value such as $7000cd/m^2$ corresponds to less legibility distance compared to higher values such as $20000cd/m^2$ or $40000cd/m^2$. However, the amount of difference between $20000cd/m^2$ and $40000cd/m^2$ is negligible in our test. CONCLUSIONS : The results of this study can be used to select appropriate luminance of valuable speed signs under fog conditions. Hence, drivers can expect to have more room to respond to adverse weather conditions, thereby reducing the risk of accidents.

최근 심부 광물자원 및 지진, 화산과 같은 심부 지각 활동에 대한 정보를 얻기 위한 심부 전기탐사의 적용성이검토되고 있다. 이에 이 연구에서는 고효율 심부 전기탐사를 실현하기 위한 분산계측 시스템을 개발하고 검증하였다. 최신 전기전자 기술을 도입하여 개발된 이 시스템은 다음과 같은 특징을 갖는다: 1) 대전력 송신과 수신기에서의 고정밀 계측이 가능하다; 2) 펌웨어 프로그래밍을 통한 시스템 동작의 허용범위가 높아 기능 개선 및 추가가 용이하여 전기탐사 이외의 다양한 정밀 계측 응용에 적용이 가능하다; 3) 작고 가벼운 외형 및 저전력, 모듈화 설계로 현장 운용 시우수한 효율성과 유지보수성을 확보하였다. 개발 시스템의 검증을 위해 우선 전라북도 부안군 일대에서 480 m 측선을 설치 후 일선현장에서 보편화되어 운용되고 있는 상용 중앙집중형 전기탐사 시스템과 동일 조건에서의 비교실험을 하였고, 이 후 심부 전기탐사의 적용가능성을 확인하기 위해 험준한 태백산 지역의 4 km 측선에서 탐사를 하여 효율적인 탐사가 가능함을 확인하였다.

Recently, the necessity of a DC resistivity survey for deeper parts has increased for the purpose of locating mineral resources and investigating earthquakes and volcanic activities. Accordingly, we developed and verified a distributed acquisition system to implement efficient deep DC resistivity surveys. The main features of our system adopting state of the art of electric and electronic technologies are described as follows: 1) high-power transmission and high-precision measurement is possible; 2) broad functional implementation by firmware programming guarantees the scalability and applicability for various geophysical high-precision measurements; and 3) it has high efficiency and maintainability in field operations due to its small size, light weight, modular design, and low power consumption. The system was verified through comparison with a commercial system under the same conditions along the 480-m survey line. After the verification, a large-scale survey was successfully carried out along the 4-km survey line at Mt. Taebaek.

최근 부산항 신항에서는 허용침하를 초과하는 잔류침하 발생으로 유지관리 비용이 증가하고 있다. 레벨 현황 레측량을 통한 2022년 기준 신항 내 잔류지반침하는 대부분 허용침하량을 초과하였다. 컨테이너 5부두의 경우 허용침하량 10 cm을 크게 초과하는 47.5 cm 침하가 발생하였다. 잔류침하 문제는 수평배수층의 단면변화에 따른 기능저하와 밀접한 관련이 있어, 본 연구에서는 지반개량에 따른 수평배수층의 변형을 기존자료를 통해 검토하고, 현장시험에서 지표침하, 간극수압, 지하수위, 층별침하를 측정하여 배수층의 변형을 확인하였다. 부산항 신항 각 공구별 계측 자료 분석 결과, 재하성토 초기(성토 높이 0~4.0 m)에 침하 및 융기변형 경향이 큰 것으로 나타났다. 현장시험 계측결과, 성토관리(1회 성토 높이 0.5 m, 성토속도 3.3 cm/일)를 실시하면 집수정간 이격거리가 60 m인 구간에서 수평배수층의 변형을 충분히 제어관리를 할 수 있어 그 역할에 문제가 없는 것으로 나타났다. 즉 제안된 속도로 성토 시 그로 의한 수평배수층의 급속한 침하나 융기는 발생하지 않았으며, 수평배수층 단면을 유지하고 있는 것으로 나타났다. 초기 성토관리가 양호할 경우 수평배수층의 기능이 감소하는 배수층의 단면 변형은 발생하지 않는 것을 계측결과로 확인하였다.

Recently, maintenance costs are increasing in Busan New Port due to residual settlement exceeding the allowable settlement. As of 2022, most of the residual settlement in New Port through leveling exceeded the allowable settlement. In the case of container pier 5, a settlement of 47.5 cm occurred, which greatly exceeded the allowable settlement of 10 cm. The residual settlement problem is closely related to the functional deterioration due to the deformation in the cross-section of the horizontal drainage layer. In this study, thus, the deformation of the horizontal drainage layer due to ground improvement was examined using existing measured data and confirmed by measuring surface settlement, pore water pressure, groundwater levels, and multi-layer settlement in field test. As a result of analyzing the measurement data for each section of the Busan New Port, it was found that the tendency for settlement and heaving was significant in the early stage of embankment fill (height of 0 to 4.0 m). Field test measurements showed that if embankment management is properly performed (a one-time fill of 0.5 m, rate of 3.3 cm/day), the deformation of the horizontal drainage layer can be sufficiently controlled when the separation distance between water collection wells is 60 m, ensuring no issues with its function. In other words, there was no rapid settlement or heaving of the horizontal drainage layer due to the fill, and the cross-section of the horizontal drainage layer remained intact. The measurement results confirmed that proper initial embankment management prevents cross-sectional deformation that would impair the horizontal drainage layer.

최신 전자, 정보통신 기술을 활용하여 실시간 차분자기/편차 검층 시스템을 개발하였다. 전체 시스템은 존데, 500 m 전동윈치 모듈, 로터리 엔코더 모듈, 주 제어모듈과 스마트 디바이스로 구성된다. 존데는 길이 1.5 m 외경 48 mm 티타늄 하우징을 가지며 내부에 디지털 출력 초소형 고정밀 MEMS 기반 AHRS, 두 개의 3축 플럭스케이트 센서가 500 mm 이격되어 있는 아날로그 고정밀 차분 자기센서, 24 비트 analog-to-digital 고정밀 계측/제어 모듈이 포함된다. 개발된 시스템의 기초현장시험을 위해 울산 삼정리 반정 저수지 옆 440 m 시추공에서 0.3 m/s의 속도로 존데를 하강시키면서 2 Hz 연속측정을 수행하였다.

A smart device-based borehole deviation and magnetic gradient logging system is proposed. The whole system consists of a sonde, 500-m long electric winch module, rotary encoder module, the main control module, and a smart device. The sonde is made up of an attitude-and-heading-references-system based on digital output miniature high-precision microelectromechanical systems, a magnetic gradiometer sensor composed of two separated three-axis fluxgate sensors spaced 500 mm apart with analog voltage output, and a 24-bit analog-to-digital high-resolution acquisition/control module. The three component modules are situated in 1.5-m length 48-mm diameter titanium housing. To evaluate the performance of the system, preliminary field test was performed at 440-m borehole located in Ulsan samjeongri. The falling speed of sonde was 0.3 m/s and 2-Hz continuous measurement and monitoring were carried out.

본 연구에서는 정성분석기법과 현장측정을 통한 분기기 고정 망간크로싱의 피로수명평가 기법에 대한 분석을 다루었다. 공용중인 분기기 망간크로싱에서의 현장측정 결과를 바탕으로한 피로수명평가와 마찰에 의한 단면강성의 변화를 고려한 정성분석기법을 이용하여 망간크로싱의 피로수명을 분석하였다. 대부분의 강재 피로설계에서는 해석 자체의 복잡성 이외에 요구되는 많은 입력 변수들로 인해 설계 단계에서의 불확실성이 발생하며 이에 따라 파괴역학 및 유한요소법에 관한 진보된 이론을 적용하기에 어려움이 있다. 그러나 본 논문에서 제시한 정성분석기법을 이용하면 복잡한 피로해석 및 평가를 설계자들로 하여금 실무에 쉽게 적용할 수 있게 한다. 또한 복잡한 해석변수에 따른 해석결과를 2차원 공간해로 표현함으로써 해석 단계에서의 불확실성을 보완하여 검토자들로 하여금 해석결과의 경향과 범위를 정의할 수 있게 하여 복잡한 해석 공식을 사용하는 노력을 저감시킬 수 있다. 본 논문에서는 이러한 설계에서의 불확실성과 복잡성을 줄일 수 있는 설계 도구를 발전시키려 노력했으며 그것으로 하나의 해법 자체가 단일 치수로 나타나는 것이 아니라 어떤 영역으로 표시되어 선택의 폭을 제시함으로서 판단할 수 있게 되었다.

The major objective of this study is to investigate the fatigue damage factor evaluation of immovability crossing for railway turnout by the field test and qualitative analysis. From the field test results of the servicing turnout crossing and qualitative analysis with frictional wear which section stiffness decreased, it was evaluated fatigue life of servicing turnout crossing. Most design practices have not taken advantage of the advanced theories in the modern fracture mechanics and finite element analysis due to complexity of analysis as well as the large quantity of vaguely defined parameters in actual designs. This paper considers fatigue problems in turnout crossing using effective analytical and design tools from the field of qualitative constraint reasoning. A set of software modules was developed for fatigue analysis and evaluation, which is easily applicable in engineering practices of designers. The techniques enable the use complex analysis formulations to tackle practical problems with uncertainties, and present the design outcome in two-dimensional design space solution. Appropriate engineering assumptions and judgments in carrying out these procedures, often the most difficult part for practicing engineers, can be partially produced by using qualitative reasoning to define the trends and ranges, interval constraint analysis to derive the controlling parameters, as well as design space to account for practical experience.

Coastal and fishing facilities are gradually deteriorating in function due to the continual accumulation of soil sediments, which has affected local economic activities. Currently, there are many methods to remove soil sediments, but these methods are either a temporary solution or require a repetitive removal of the soil sediments, which is a huge financial burden for the maintenance of the facilities. To solve these problems, this study proposed a non-power soil cleaning system and evaluated field applicability by carrying out field model tests. The conditions for the evaluation focused on the drainage-elapsed time and drainage-outflow velocity according to the water level change in the water tank. In the field test, silty clay and sand were separately installed, and sedimentation soil removal test was practiced. As a result, the system was verified to have a sufficient outflow velocity for the removal of soil sediments. In addition, a generalization equation that can be used in different regions of the tide was suggested in this study. These results will greatly contribute to removing soil sediments in ports and dike gate facilities on the southwest coast. Since the system is an eco-friendly technology that does not require additional energy, thus it is expected to contribute to maintenance of sustainable facility performance as well as economic effect in the future.

본 연구에서는 접이식 웨지를 장착한 강관네일의 거동 특성 평가를 위해 현장인발시험 및 3차원 수치해석을 수행하였다. 접이식 웨지를 장착한 강관네일의 현장인발시험 결과 접이식 웨지가 없는 경우에 비해 약 30% 정도의 인발 저항 증진효과가 있는 것으로 평가되었다. 한편, 강관네일의 합리적인 인발거동 분석을 위해 3차원 수치해석에서는 접이식 웨지가 장착 되지 않은 강관네일의 역해석을 통하여 현장 인발거동과 일치하는 네일과 지반사이의 마찰 특성을 평가하고, 이를 접이식 웨지가 장착된 강관네일의 해석에 도입하여 그 거동을 분석하였다. 시행착오를 통한 역해석 결과 그라우트와 지반 사이의 마찰계수(${\mu}$)는 약 1.2 정도가 발휘되는 것으로 평가되었으며, 강관네일의 극한인발저항력은 $$T_L{\sim_=}32$$ tonf으로 접이식 웨지가 장착되지 않은 네일의 $$T_L{\sim_=}24$$ tonf 보다 약 33% 증가하는 것으로 평가되어 현장인발시험결과와 거의 일치하는 것으로 나타났다.

In this study, field pull-out test and 3-D FEM analysis have been performed for examining and reflecting the behavior of steel pipe nailing installed foldable wedge. Field pull-out test was performed under various conditions. As a result, the steel pipe nailing installed foldable wedge has an effect of pull-out resistance increased about 30% in comparison with non-wedge type steel pipe nailing. Through back analysis in 3-D FEM for behavior of non-wedge type steel pipe nailing, friction characteristics between nail to soil was analyzed and obtained first consistent with field pull-out behavior. Then, the frictional characteristic was used for analyzing the behavior of the steel pipe nailing installed foldable wedge. The result was compared with the test results. Consequently, friction coefficient (${\mu}$) of about 1.2 between grout to soil leads to good agreement with analysis results and test results. And a limited pull-out resistance, $$T_L{\sim_=}32$$ tonf is similar to field pull-out test result which is improved about 33% in comparison with non-wedge type steel pipe nailing's $$T_L{\sim_=}24$$ tonf.

PURPOSES : The purpose of this study is to suggest a specific investigation guideline to decide priority of repairing old concrete pavements that pile up substantially. METHODS : In this study, a principle of division of homogeneous sections was proposed to reflect the characteristics of the pavement reasonably in the specific investigation results. In addition, a checklist and guideline of field investigation were suggested for the old concrete pavement sections, which require inspection toward their durability and structural performance. Furthermore, the items of laboratory test necessary to the old concrete pavement were suggested based on the existing laboratory test considering characteristics of the old concrete pavement. The present condition of the old concrete pavement could be analyzed by the test results. RESULTS : A method of division of homogeneous sections suitable for the specific investigation of the old concrete pavement was suggested. The proportions of distress severity of pavement sections were compared by distress type to figure out the present state of the old concrete pavement. Scaling, durability cracking (or alkali-silica reaction), and longitudinal spalling were selected as the most severe distress types. The detailed positions of the sections were also suggested. The checklist of the specific investigation was categorized by field survey and laboratory test, and its evaluation criteria were proposed. The three types of the sections of durability cracking (or alkali-silica reaction), bridge connection, and asphalt overlay were selected as the sections of the field survey. The compressive strength, void structure, and chloride penetration depth were suggested as the items of the laboratory test. CONCLUSIONS : A fundamental level of the guideline was suggested in this study to resolve the problem of old concrete pavement. Appropriate guidelines related to the repair of the old concrete pavement should be provided by performing additional research efforts.

실제 수사현장에서 객관적인 증거 확보가 어려운 사건이 많아짐에 따라, 사건 관계자들의 진술의 진위 여부를 확인하기 위한 폴리그래프 검사 수요는 해마다 증가하고 있다. 그럼에도 불구하고 폴리그래프 결과와 검찰 처분 및 판결 일치도에 영향을 줄 수 있는 죄명, 피검사자 변인, 검사 형태 등 폴리그래프 내적 요인에 대한 연구는 거의 전무한 실정이다. 이에 본 연구는 2009년부터 2012년까지 전국 검찰청에서 진행되었던 6273건 8609명의 폴리그래프 검사 자료를 바탕으로 폴리그래프 관련 요인에 따른 검찰 처분 및 판결 일치도를 분석하였다. 분석 결과 폴리그래프 검사 결과는 검사 형태에 따라 가장 큰 차이를 보였으며 양당사자 검사가 단독 검사에 비해 판단불능이 적게 나오는 것으로 나타났다. 두 번째로 폴리그래프 검사 결과와 검찰 처분의 일치도를 분석한 결과, 78.6%가 일치한 가운데 검찰 처분 종류와 검사 죄명에 따라 일치도에서 유의미한 차이를 보였다. 하지만 성, 연령, 법적 신분과 같은 피검사자 특성과 폴리그래프 결과는 일치도에 영향을 주지 않았다. 마지막으로 폴리그래프 결과와 법원 최종 판결이 일치하는 경우는 83.6%였으며, 특히 폴리그래프 검사 결과가 거짓일 때 일치도는 90.8%로 매우 높았다. 본 연구 결과는 국내에서 최초로 실무 데이터를 바탕으로 폴리그래프 관련 요인과 법적 처분을 비교 분석하였다는 점에서 의의가 있다.

Recent trends in the criminal cases without convincing evidence have shown to increase. Consequently, the demand for polygraph examinations to verify the statements offered by conflicting parties has been simultaneously growing. Yet, unfortunately, previous studies rarely focus on the factors that may influence the polygraph results which often proceed to affect legal decisions. Thus, this study compared polygraph test results with prosecutions and court decisions, and offered to provide comprehensive information on the factors related to polygraph, which have shown to influence the agreement rate between the polygraph results and legal decisions. The data used for this research was from examinations of 6,273 cases and 8,609 subjects; these tests were administered in the Korean prosecutors’ offices during 2009 to 2012. Results suggested that the likelihood of drawing a conclusive result differed as a function of the polygraph testing method; a conclusive result was more likely when examinations were done in the paired-testing method compared to the single-testing method. In terms of the overall agreement rate between the polygraph results and the prosecutors’ indictments, 78.6% were in agreement and this rate was significantly affected by the crime and the type of indictment. However, demographic factors such as sex, age and legal status did not influence the overall rate. The analysis for comparing the polygraph test results with the court decisions demonstrated that 83.6% were in agreement. More specifically, the rate of the examiners correctly judging the convicted suspects as guilty in the polygraph tests was as high as 90.8%. This study is the first to use a field data to investigate the factors that are related to polygraph and their effect on legal decisions. The findings will be a significant endeavor in promoting the accuracy of polygraph testing in legal procedure.

최근에는 발생되고 있는 염화물계 제설제의 도로 손상, 차량 부식 및 미끄럼으로 인한 교통사고 문제를 해결하기 위해 친환경 제설제의 사용이 권장되고 있다. 그러나, 현재 수행되고 있는 친환경 제설제의 성능 시험 방법은 실내에서 얼음을 이용하여 실시되고 있으나, 실제 현장 성능과의 상관 관계가 낮은 것으로 나 타났다. 따라서 본 논문에서는 현재 수행되고 있는 제설제 성능평가 방법을 소개하고 국내 실정에 부합하는 제설제의 성능 검증을 위한 현장 시험 방법을 제안하고자 한다.

본 연구는 국내 유료도로에 적용될 ETCS의 방식을 결정하기 위해 ETCS 현장성능평가에 참여한 6개 업체의 현장성능 평가 과정을 소개하고 이에 대한 평가결과를 분석한 것이다 현장성능평가에 참여한 업체의 주요 통신방식은 능동형 RF(전파)방식과 IR(광파)방식의 ETC 시스템이다. 본 연구에서는 업체별 통신방식과 시스템을 비교분석하고 시스템 구성과 기본성능을 확인한 후, 최종적으로 현장성능시험의 시험항목별 시험내용과 평가결과를 분석하였다. 현장성능평가 분석결과, 현장성능시험에 참여한 6개 업체 가운데 IR방식 1개 업체와 RF방식 2개 업체는 평가기준을 만족하고 나머지 3개 업체는 평가기준을 통과하지 못했지만, 전반적으로 볼 때, 그동안의 많은 시험과 개발과정을 거쳐 안정화가 되어 가고 있는 것으로 여겨진다. 본 현장시험에 사용한 성능평가방법은 현재 고속도로를 이용하는 또는, 하이패스에 이용되는 패턴을 충분히 고려하였지만, 발생될 수 있는 여러 경우에 대해 한국도로공사 자체기준으로 시험방법과 시험횟수를 정하였기 때문에 이에 대한논란의 여지는 있을 수 있다 따라서, 실제 고속도로상에서 발생될 수 있는 운전자의 행태나 도로 운영 방법 등 차량운행실태 등을 고려한 현장성능 시험 표준방법론의 개발이 필요한 것으로 판단된다.

This study introduces the process of the field test of ETCS that has been performed by six enterprises for selecting the type of ETCS that will be applied to the internal tall roads. The main communication modes of six enterprises are active RF(radio wave)type and IR(optical wave)type. In this study, communication modes and systems, which are being used by each enterprises, have been compared and analyzed. Besides this, the configuration and the basic performances of the system have been checked. After those, the contents of the field performance test classified by the items of the test and the results of the test, finally, have been analyzed. Through analyzing the test, it is found that an enterprise using IR type and two enterprises using RF type satisfied the standards of the test and the others failed to meet the standards. However, the enterprises seem to be becoming stable by a large number of tests and the effort for improving from general point of view. Although the methods of performance evaluation in this field test considered enough patterns that are used in the present highway or Hi-Pass, there might possibly be some problems in the results because Korea Highway Corporation had decided the method and the number of times of the test according to their own standards about the various situations that can happen. Therefore, it will be needed to develop the method of standards for testing the performance which can be correspond with driver's behavior that can actually happen on the highway or the methods of transportation management.