详情

原文传递 HORIZONTAL CURVE DESIGN FOR PASSENGER CARS AND TRUCKS.

题名：	HORIZONTAL CURVE DESIGN FOR PASSENGER CARS AND TRUCKS.
作者：	Harwood-DW; Mason-JM Jr.
关键词：	AASHTO-; GEOMETRIC-DESIGN; HORIZONTAL-CURVES; HIGH-SPEED; LOW-SPEED; SENSITIVITY-ANALYSIS; MARGIN-OF-SAFETY; SKIDDING-; ROLLOVER-; AUTOMOBILES-; TRUCKS-; DESIGN-SPEED; RURAL-HIGHWAYS; URBAN-HIGHWAYS
摘要：	The adequacy of the 1990 AASHTO geometric design policy for safely accommodating both passenger cars and trucks on horizontal curves is evaluated. The evaluation includes both the high-speed or open-highway horizontal curve design criteria in AASHTO Green Book Table III-6 and the low-speed design criteria for intersections and turning roadways in AASHTO Green Book Table III-17. The evaluation of current horizontal curve design policy is conducted by means of a sensitivity analysis that evaluates the margin of safety against vehicle skidding and rollover for both passenger cars and trucks traveling at the design speed on minimum-radius curves designed in accordance with AASHTO policy. It is concluded that current AASHTO horizontal curve design policy for rural highways and high-speed urban streets in Green Book Table III-6 provides an adequate margin of safety against both skidding and rollover as long as vehicles do not exceed the design speed of the curve. However under nearly worst-case conditions, skidding and rollover can occur on a horizontal curve, particularly at lower design speeds, if vehicles exceed the design speed by only a small amount. This finding suggests the importance of selecting a realistic horizontal curve design speed that will not be exceeded by substantial portions of the traffic stream. The AASHTO horizontal curve design criteria for intersections and turning roadways and low-speed urban streets, presented in Green Book Tables III-16 and III-17, are generally adequate for passenger cars that do not exceed the design speed, but may not be adequate for all trucks.
总页数：	Transportation Research Record. 1994. (1445) pp22-33 (7 Tab., 9 Ref.)
报告类型：	科技报告