The Highway Safety Manual [HSM, 2010] recommends safety evaluations be performed before implementing any roadway treatment to predict the expected safety consequences. Safety consequences can be measured using crash prediction models, Crash Modification Factor (CMFs), or both. This paper develops a CMF to show the expected impact of red-light cameras (RLCs) on safety at signalized intersections...

In most of the developing countries, the metropolitan organizations do not assess the safety consequences of alternative transportation systems and one of the reasons is the lack of suitable methodology. The goal of this paper is to develop practical tools for assessing safety consequences of arterial roads in the context of long-term urban transportation plans in Dhaka city, the capital of Ban...

The design of Automated Highway Systems (AHS) involves the use of advancedtechnologies and automation to make the current transportation system more efficient interms of capacity, safety and pollution. The principal question is whether thesetechnologies will lead to any benefits in terms of safety, capacity and traffic flowcharacteristics as the degree of penetration in the curr...

In order to determine the rational width of coal pillars and study surrounding rock control technology gob side entry driving with a narrow pillar, this paper first calculates pillar according limit equilibrium theory; after that, lateral support pressure plastic zone development goaf is analyzed by numerical simulation reserved pillar; finally, through ring breaking deformation regulation entr...

Understanding injury severity patterns in roadway crashes is important not only from the view point of treating crash victims, but also for directing the crash avoidance efforts of traffic safety agencies and motor vehicle manufacturers. The factor that is most discussed in this context is vehicle incompatibility. However, there are other vehicle-, occupant-, and roadway-related factors, too, t...

The design of Automated Highway Systems (AHS) involves the use of advancedtechnologies and automation to make the current transportation system more efficient interms of capacity, safety and pollution. The principal question is whether thesetechnologies will lead to any benefits in terms of safety, capacity and traffic flowcharacteristics as the degree of penetration in the curr...

introduction: due to sensitiveness of flow to roughness coefficient (rc), selection of this coefficient is important in earth canals designing purposes. precision selection of this coefficient is necessary for design and operation of earthen canals purposes. overestimation of the actual amount of this coefficient will cause an underestimation for flow velocity. accordingly, sedimentation in the...

X-ray and electron di!raction have been used to determine the surface roughness parameters of thin "lms and thus evaluate roughness e!ects on magnetic properties. For self-a$ne roughness, the demagnetizing factor is in#uenced by the roughness exponent H, and is proportional to w/m2 with w being the RMS roughness amplitude and m being the lateral correlation length. Roughness anisotropy can ampl...

The recent advances in computer visualization methods have made it possible to exploit the possibility of applying scientific visualization methods in critical research areas in the field of transportation engineering. In this paper we develop new visualization methods for road design and safety. Typically, roads are designed by combining horizontal and vertical roadway alignments, to allow for...