정보통신기술(Information and Communication Technology)과 기존 교통수단의 융복합으로 수소자동차, 자율주행자동차 등과 같은 새로운 교통수단 등장으로 광역 이동과 같은 이동성이 향상될 것으로 기대되고 있다. 또한, 보다 빠른 광역 이동성 확보를 위해 BRT 전용차로 도입에 대한 논의가 계속되고 있으므로 본 연구는 BRT 전용차로 구간에서 자율주행자동차의 혼입률 및 대중교통 전환율에 따른 시나리오를 설정해 서비스수준 분석을 기반으로 잉여차로 발생 가능성을 확인하였다. 더불어, 미래교통량 증가와 자율주행 기술 의 발전이 BRT 전용차로 운영 구간에 미치는 변화를 분석해 도로의 자산가치 산정을 목적으로 하고 있다. 설정한 시나리오에서 도로 가 기능을 발휘할 수 있는 일정한 서비스수준(Level of Service, LOS)를 유지하는 자율주행자동차 혼입률 수준을 파악하였으며, A~F 의 6단계로 구분하여 결과를 도출하였다. 도로의 자산가치 산정방법은 국가회계기준에서 제시하고 있는 토지의 대체적 평가방법 4가 지 방법과 보다 객관성을 확보한 새로운 자산가치 평가방법을 준용하여 도로의 자산가치를 산정하였다. 분석 결과, 간선도로 서비스수 준을 통해 BRT 전용차로를 시행하면서 연속류 구간에서는 자율주행자동차 혼입률이 75%되는 경우 편도 3차로에서 편도 2차로로 1차 로 감소가 이루어져도 현재의 서비스수준을 유지할 수 있으며, 단속류에서는 자율주행자동차의 혼입률이 50%되는 시점에 편도 4차로 에서 편도3차로 1차로 감소 시 동일한 효과를 발휘할 수 있음을 확인하였다. 즉, 연속류 구간에서 자율주행자동차 비율이 75% 및 단 속류 구간에서는 자율주행자동차의 비율이 50%되는 시점에서 1차로에 대한 도로 자산가치가 발생할 수 있음을 알 수 있었다. 이와 같은 잉여차로는 보행약자를 위한 보행 공간 및 자전거도로, 개인형이동장치((Personal Mobility, PM)전용도로, 완충녹지 등의 완전도 로로 활용될 수 있음을 시사하고 있다.

PURPOSES: This study aimed to evaluate the performance of a model developed for road surface temperature change pattern in reflecting specific road characteristics. Three types of road sections were considered, namely, basic, tunnel, and soundproof tunnel. METHODS: A thermal mapping system was employed to collect actual road surface temperature and locational data of the survey vehicle. Data collection was conducted 12 times from 05:30 am to 06:30 am on the test route, which is an uninterrupted flow facility. A total of 9010 road surface temperature data were collected, and half of these were selected based on a random selection process. The other half was used to evaluate the performance of the model. The model used herein is based on machine learning algorithms. The mean absolute error (MAE) was used to evaluate the accuracy of the estimation performance of the model. RESULTS: The MAE was calculated to determine the difference between the estimated and the actual road surface temperature. A MAE of 0.48℃ was generated for the overall test route. The basic section obtained the smallest error whereas that of the tunnel was relatively high. CONCLUSIONS: The road surface temperature change is closely related to the air temperature. The process of data pre-processing is very important to improve the estimation accuracy of the model. Lastly, it was difficult to determine the influence of the data collection date on the estimation of the road surface temperature change pattern due to the same weather conditions.

The Ground Penetrating Radar(GPR) is a typical non-destructive test equipment which is widely used in seeking a cavity or underground facility. Test results are generally expressed 2D monochrome or color images, distribution of the parabolic waveforms are used to determine the existence of cavity and facility. (Fig. 1) But, an analysis method of image may cause errors depending on the knowledge and experience of analyst. In this study, we analyzed the coefficient of correlation between A-Scan data of GPR to judge the existence of cavity located under the pavement layer. The correlation analysis was performed based on the assumption that the relationship of correlation between a number of A-Scan data passing through a non-cavity section is larger than a small number of A-Scan data passing through a cavity section, and relationship of correlation was visualized using Surfer Program. (Fig. 2) In addition, apart from the correlation analysis, we compared the Power spectrum of the A-scan data for the cavity section and non-cavity section. In other words, assuming that the size of the energy changes depending on the existence of the cavity, PSD (Power Spectrum Density) is obtained for all the B-Scan data, and the tendency of the energy size is confirmed using the 3D wireframe map of the Surfer program. (Fig. 3) As a result, the correlation coefficient shows a small tendency in the cavity section and the PSD shows a large tendency, which is intuitively recognized that the energy attenuation in the cavity section is smaller than other material. But, there are some ambiguous sections to judge the tendency clearly, this is estimated to be noise on the underground facility and it is necessary to take measure of mitigating this.

PURPOSES: Pavement Management System contains the data that describe the condition of the road. Under limited budget, the data can be utilized for efficient plans. The objective of this research is to develop a mixed integer program model that maximizes remaining durable years (or Lane-Kilometer-Years) in road maintenance planning. METHODS: An optimization model based on a mixed integer program is developed. The model selects a cluster of sectors that are adjacent to each other according to the road condition. The model also considers constraints required by the Seoul Metropolitan Facilities Management Corporation. They select two lanes at most not to block the traffic and limit the number of sectors for one-time construction to finish the work in given time. We incorporate variable cost constraints. As the model selects more sectors, the unit cost of the construction becomes smaller. The optimal choice of the number of sectors is implemented using piecewise linear constraints. RESULTS: Data (SPI) collected from Pavement Management System managed by Seoul Metropolitan City are fed into the model. Based on the data and the model, the optimal maintenance plans are established. Some of the optimal plans cannot be generated directly in existing heuristic approach or by human intuition. CONCLUSIONS: The mathematical model using actual data generates the optimal maintenance plans.

PURPOSES: The objective of this study is to find Percentile Speed( ) for Appraisal of Road Section with Recurring Congestion. METHODS : Percentile Speed( ) is determined by correlation analysis of CSI that proposed existing literature. and CSI(Consistency Service Index) is a index that subtract service fail frequency from 100 points, and service fail is defined as traffic situation is driving less than 80kph speed. In this study, We analyzed the highest correlation percentile speed associated with CSI. This speed is chosen as a delay decision speed. In order to verifying reliability, it performed a comparison with the previous method. RESULTS : As a result, 30 percentile speed( ) was decided as index speed for judgement of recurring congestion section, and through comparison with existing methods, we demonstrated that 30 percentile speed can be useful for judgement of recurring congestion section. CONCLUSIONS: This method to Determine recurring congestion section using the percentile speed( ) was proposed for the first time in this paper. This method can be applicated more quickly and easily than existing method for determining of recurring delay section .

PURPOSES: This paper aims to give a guideline and the way to apply the advanced composite materials theory to the road structures with different cross sections to the practicing engineers. METHODS: To simple but exact method of calculating natural frequencies corresponding to the modes of vibration of road structures with different cross sections and arbitrary boundary conditions. The effect of the D22 stiffness on the natural frequency is rigorously investigated. RESULTS: Simple method of vibration analysis for calculating the natural frequency of the different cross sections is presented. CONCLUSIONS: Simple method of vibration analysis for calculating the natural frequency of the different cross sections is presented. This method is a simple but exact method of calculating natural frequencies of the road structures with different cross sections. This method is extended to be applied to two dimensional problems including composite laminated road structures.

본 연구는 고속도로 야생동물 유도울타리 설치효과를 분석하여 적정한 유도울타리 설치 개선 및 관리방안을 제시하고자 중앙고속도로 만종분기점~홍천나들목구간을 대상으로 수행하였다. 고속도로에 설치된 유도울타리는 포유류의 도로침입 방지효과가 있었으며, 방음벽, 낙석방지울타리, 2단 가드레일과 분리방호벽도 로드킬 예방에 효과적인 시설이었다. 유도울타리의 로드킬 저감 효과는 출입문이 설치된 높이 1.5m의 울타리보다 출입문이 설치되지 않은 높이 1.0m 구간이 로드킬 감소효과가 높아 출입문의 유무가 로드킬 저감에 중요한 요인으로 판단되었다. 또한 도로시설물의 연결지점에서 로드킬 저감 효과가 컸으며 출입문이 있더라도 관리가 잘되는 지역도 로드킬 감소효과가 높았다. 유도울타리는 설치연장이 증가함에 따라 로드킬 감소율이 높았다. 유도울타리 끝 부분과 절토부 주변은 로드킬에 취약하여 이에 대한 개선이 요구되었다. 울타리 유지관리용 출입문은 설치간격이 가까울수록 로드킬 발생량이 높아 출입문 관리가 로드킬 저감에 효과가 많은 것으로 판단되었다. 고속도로 유도울타리 설치 개선방안은 암반의 급경사 지역 외에 모두 설치되어야 하고, 도로상의 낙석방지책, 2단 가드레일, 방호벽 등은 적정 시설개선을 통해 유도울타리로 연결 설치되어야 한다. 출입문을 설치할 경우 자동개폐식 또는 중력개폐식으로 설치하여 개방을 방지하고 야생동물 탈출로가 조성이 되어야 한다. 겸용생물이동통로는 토양층 복원이나 식생공간을 조성하여 생물이동통로화 하여야하며 로드킬로 포식자에 의한 2차 로드킬을 막기 위해 사고난 사체는 즉시 도로외부로 처리가 되어야 한다. 울타리는 최소 사고예방 목표지점으로부터 양방향 500m 이상 즉 1,000m 이상 설치되어야 하며 가급적 다음 도로시설인 교량, 통로박스 등까지 연결하여 야생동물을 생물이동통로로 안전하게 유도하여야 한다.

도로의 안전성은 종단선형, 평면선형, 횡단경사(편경사), 노면온도 등 여러 가지 요인에 의하여 결정되며 이러한 각종 데이터는 도면으로 구하기 어렵고 실제 도면과 현황 데이터가 포장의 덧씌우기 등으로 달라지는 경우가 있다. 이러한 데이터를 측량하기 위해서는 많은 시간과 비용이 필요하고 차량의 통행이 빈번한 곳에서는 위험한 작업이 될 수 있다. 본 연구에서는 한국건설기술연구원의 도로 안전성 조사 분석차량인 RoSSAV(Road Safety Survey & Analysis Vehicle) 차량을 이용하여 주변 교통류 속도와 맞추어 차량에 부착된 GPS-INS와 회전식 레이저를 이용하여 도로의 횡단경사를 취득하고 분석을 통하여 도로의 안전성을 분석하고 도로의 안전성 개선방향에 대하여 제시하였다. 이를 위하여 측정된 값의 정확도를 비교하였으며 회전식 레이저데이터 처리 알고리즘을 제시하였다.

To the present, technology of tunnel has developed more significantly than before. Due to the difficulty in assessment of long-term durability, it is more important to persistently maintain the tunnel to save the budget efficiently since its completion. Some aspects of the focused management section were written for some of the road tunnels which was recently inspected by KISTEC according to the special law for safety management of Infrastructure.

This study examined test piece production and on-the-spot test results of power supply system of road surface temperature sensor module that was put to forecast road freezing at bridge section. The temperature sensor module was produced to replace sensitive sensor (temperature and humidity sensor) of road surface that was put by wire system, and to supply power on-the-spot by itself, And, the study researched optimization considering power consumption for self power generation and sensor operation.