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Stability of man-made slopes: A numerical case study using an extreme rainfall distribution in Brunei Darussalam

E K Abdul Rahman, U Ratnayake, S J Tan, S Shams, D Haji Othman, R R Abdullah

The number of slope failure cases in Brunei Darussalam has been observed to increase during periods of intense rainfall, such as during the month with peak rainfall. Like other countries around this region, a recommended value of slope angle during earthwork and construction has been established. However, the apparent correlation between landslides and high rainfall intensity suggests that an inve...

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A review of chemical stabilisation in road construction

Tan Eng Hie, El-Said Mamdouh Mahmoud Zahran, Soon Jiann Tan

This paper presents a literature review of the application of cement, lime and polymer emulsion in road construction. The focus is mainly on the soil candidates, binding mechanism, the reported strengths and weaknesses for each chemical stabiliser used in soil stabilisation. While it is generally agreed that cement is best suited for sand-sized to gravel-sized soil mixtures (well-graded), lime is ...

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A laboratory investigation of the compaction properties of road sub-base stabilised with cement and latex copolymer

E H Tan, E M M Zahran

The quality of road pavements is an important factor to ensure an acceptable level of service and safety to the road users. When flexible road pavements are to be constructed on weak sub-grade soils, it is often necessary to provide a stabilised sub-base to improve their relevant engineering properties. This paper presents the results and observations from a laboratory investigation evaluating the...

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Edge Computing for Road Safety Applications

Shiqah Hadi, K. Murata, S. Phon-Amnuaisuk, P. Pavarangkoon, T. Mizuhara, Tan Soon Jiann

Modern technologies are being developed to address the alarming rise in road accidents caused by drivers’ errors. We leverage computer vision and deep learning at the edge (i.e., in a car) to detect vehicles and pedestrian that are in the surroundings. This information can then be employed to direct driver’s attention to relevant information, minimizing the effects of human errors. This work explo...

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An investigation into the impact of alternate road lighting on road traffic accident hotspots using spatial analysis

El-Said Mamdouh Mahmoud Zahran, Soon Jiann Tan, Yok Hoe Yap, Eng Hie Tan, Christian Marc Francisco Pena, Christian Marc Francisco Pena, Hui Fong Yee, Mohammad Rakib Uddin

The aim of this paper is to investigate the impact of alternate road lighting (i.e. switching off every other road light at selected roadways) on road traffic accident (RTA) hotspots using Spatial Traffic Accident Analysis (STAA) - a GIS hotspot analysis method that takes into account RTA frequency and socio-economic impact. STAA was used to identify and rank into four hierarchical risk levels day...

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Development of a road illumination measurement system

Muhammad Amirul Afiq bin Ramli, Mohammad Rakib Uddin, Soon Jiann Tan, El-Said Mamdouh Mahmoud Zahran, Yok Hoe Yap

Several measures, such as reduced lighting, may be adopted to minimise energy consumption while providing an optimal and safe level of road lighting. One approach to evaluate the safety impact of reduced road lighting is by using Geographical Information System (GIS) to identify road sections with low level of illumination and high risk of road traffic accidents. The GIS approach required a cost-e...

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