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Abstrak :
Berangkat dari asumsi bahwa minimnya informasi visual sangat berpengaruh terhadap tingginya resiko terjadinya kecelakaan, maka penelitian ini dilakukan dengan tujuan untuk memperaleh gambaran mengenai perilaku pengendara ketika berkendaraan di jalan dalam kandisi berbeda. Secara khusus peneiitian dilakukan dalam kondisi pada saat kendaraan memasuki persimpangan. Sejumlah subjek diminta untuk mengemudikan sebuah kendaraan studi sepanjang jalan yang ditentukan dengan menggunakan alat perekam gerakan mata (Eye Mark Recorder) yang dipasangkan di kepala. Alat yang digunakan adalah Eye Mark Recorder NHC V yang dapat mencatat secara terpisah gerakan masing-masing bola mata dan menerjemahkannya kedalam notasi berbeda untuk mata kiri dan mata kanan. Data yang diperoleh selanjutnya dianalisa untuk gerakan mata tiap mili second berdasarkan variasi objek yang di Iihat, waktu tatap maupun frequensinya. Hasil analisa kemudian dihubungkan dengan aspek keselamatan dan resiko kecelakaan.

Abstrak :
The high accident number that prevail in most developing countries and big countries have always been an indication of lack of appropriate program on traffic safety, though this may not imply the absence of such. It has been commonly accepted that developing countries face a complicated problem when it comes to the handling of low quality of traffic safety. Such problems even escalate in big countries such as China, Indonesia and India. There are no fixed formula when it comes lo traffic safety as the case will be very local and typical in each country and productive set of measures in a country may not be applicable in other countries of similar size and problems. Out of the varying discrepancies, problematic countries do have some common needs in terms of improvement of conditions. Seven Asian countries with severe traffic safely conditions: Bhutan, The Philippines, China, Indonesia, India, Nepal, Mongolia are compared in this paper and problems are identified to lead to an appropriate possible measures which are expected to be representative. Underlying problems are identified, classified and analyzed. A proposed scheme of Traffic Safety Programme is then formulated, out of which a further development is made to form an action plan.

Abstrak :
A median is required for a two-way road to separate the opposite traffic and prevent head-on collisions. In road capacity calculation, the median factor contributes in terms of its existence regardless of the difference in median types. Road capacity is determined by a number of geometric factors such as road types, width of carriageway, shoulder/curb characteristics, and the presence/absence of medians, etc. The contributions of these factors are represented by the coefficients in the capacity calculations. Despite the different types of medians, the Indonesian Highway Capacity Manual (IHCM) does not adopt different coefficients to accommodate the effects in the capacity. The aim of this study is to obtain an adjustment factor for road capacity calculation based on median types. The method of this study adopts video recordings of real traffic moving along three different types of medians: raised medians, fenced medians, and line medians. As it is assumed that the effects of different median types are expressed in the vehicles’ safety distances from medians, the capacity of the road will also vary by types of medians. The adjustment coefficients for roads with raised medians, fenced medians, and line medians obtained are: 0.79, 0.78, and 0.81, respectively. The results of this study confirm that in addition to the presence of the medians, the types should essentially be considered in calculating the road capacity. The result of this study will contribute to the enrichment of the road capacity calculation in the IHCM.

Abstrak :
Accident prone locations refer to locations having or susceptible to having, a greater than average number of accidents which are represented by outstanding figures of repetitive accident occurrences along the roads. Any appropriate application of remedial safety treatments will require ­an in-depth study to find the accident causations and the possible contributing factors. The present study adopts the combined approach of Systems Theory which proposes that accidents are the result of maladjustments in the interaction between the components of complex systems, and the Causal Accident Theory which tries to find the real causes of accidents by probing the events leading to each accident in detail. The case study was conducted at Gringsing Roundabout in Central Java and the intersecting roads, the data of which reveal a high frequency of accidents. The data were analyzed using cross tabulations to produce first-hierarchy and second-hierarchy accident causations. Results indicate that geometric features, as the predominant factors, lack compliance with the standards. The remedial safety treatment therefore focuses on geometric redesigning of the roundabout in compliance with geometric standards and traffic demand. A major change, in conjunction with other hazard reduction schemes along the roads, is also proposed to the existing roundabout. The proposed changes are expected to mitigate or remove the possible accident causes, thus reducing accident occurrences.