公路几何方面的定量评价

Highway Research Record Pub Date : 1900-01-01 DOI:10.5703/1288284313619

K. Tharp

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引用次数: 4

摘要

对实际道路弯道上的车速进行了详细的研究。首先进行了初步研究，并将其扩展到以下几何特征:5又1/4度水平曲线、一个直角转弯、从4车道到2车道的过渡段、一条合并线和一座狭窄的桥。研究发现，几何方面的模量通过所有几何特征提供了可重复的交通流易于量化评级，除了那些需要非常严重的速度变化。/ RRL /

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A QUANTITATIVE EVALUATION OF THE GEOMETRIC ASPECTS OF HIGHWAYS

A DETAILED STUDY WAS UNDERTAKEN OF VEHICLE SPEEDS ON AN ACTUAL ROAD CURVE. A PILOT STUDY WAS CARRIED OUT, AND THIS WAS EXTENDED TO INCLUDE THE FOLLOWING GEOMETRIC FEATURES' 5 1/4 DEG HORIZONTAL CURVE, A RIGHT-ANGLE TURN, TRANSITION SECTION FROM 4 LANES TO 2 LANES, A MERGING LINE AND A NARROW BRIDGE. IT WAS FOUND THAT THE MODULUS OF GEOMETRIC ASPECTS PROVIDES A REPRODUCIBLE QUANTITATIVE RATING OF THE EASE OF TRAFFIC FLOW THROUGH ALL GEOMETRIC FEATURES EXCEPT THOSE REQUIRING VERY SEVERE SPEED CHANGES. /RRL/

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Highway Research Record

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