Variable Residential Density: Optimum Traffic Density and City Size

the effect of traffic density on the accident externality from driving the case study of tehran

در این پژوهش به بررسی اثر افزایش ترافیک بر روی تعداد تصادفات پرداخته شده است. به این منظور 30 تقاطع در شهر تهران بطور تصادفی انتخاب گردید و تعداد تصادفات ماهیانه در این تقاطعات در طول سالهای 89-90 از سازمان کنترل ترافیک شهر تهران استخراج گردید و با استفاده از مدل داده های تابلویی و نرم افزار eviews مدل خطی و درجه دوم تخمین زده شد و در نهایت این نتیجه حاصل شد که تقاطعات پر ترافیک تر تعداد تصادفا...

Measuring Heterogeneous Traffic Density

Traffic Density provides an indication of the level of service being provided to the road users. Hence, there is a need to study the traffic flow characteristics with specific reference to density in detail. When the length and speed of the vehicles in a traffic stream vary significantly, the concept of occupancy, rather than density, is more appropriate to describe traffic concentration. When ...

Variable density spiral fMRI

Introduction: In the original variable-density (VD) spiral trajectory[1], the sampling density varies throughout the k-space trajectory; i.e., k(τ) = λτe , where the parameter α controls the rate of density variation. Here, we propose a k-space trajectory consisting of an Archimedean spiral[2] from the origin out to a given radius k1, and extending beyond k1 with a variable-density spiral of α>...

The Calculation of Perceived Residential Density

Traffic Density Estimation from Highly

12 In this paper, we address the problem of how to accurately estimate the traffic 13 density of road segments from highly noisy image sources. Conventional traffic 14 density estimation techniques from camera feeds typically rely on high quality 15 images. Surprisingly, a large number of live feeds from traffic cameras in devel16 oping regions are highly noisy due to poor camera quality, poor ...