Ramp Signing for Trucks. Final Report PDF Download
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Author: Richard L. Knoblauch
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Author: Richard L. Knoblauch
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author: David K. Witheford
Publisher: Transportation Research Board
ISBN: 9780309053051
Category : Roads
Languages : en
Pages : 68
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Book Description
This synthesis will be of interest to highway design engineers, maintenance personnel, safety and enforcement officials, traffic engineers, and others responsible for the safe operation of large trucks on highways. Information is provided on the critical aspects of site location, design criteria, and maintenance procedures, and their relationship to truck escape ramp performance. The safety of truck drivers, other road users, and occupants of roadside properties is often imperiled by the combination of heavy trucks and steep downgrades on highways. Frequently, gearing down, applying the brakes, and using the retarding power of the engine are not sufficient to control the truck, and serious crashes can result. Many states have constructed truck escape ramps to safely remove runaway trucks from the traffic stream. This report of the Transportation Research Board provides information on the location, design, construction materials, geometrics, and construction costs of truck escape ramps. Operational considerations, such as descriptions of advance warning signs, traffic control devices at the ramp, and vehicle removal procedures are described. Information on frequency and type of usage, maintenance of the ramps, and driver-related issues is also included.
Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 348
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Book Description
Author: Douglas W. Harwood
Publisher: Transportation Research Board
ISBN: 0309087562
Category : Buses
Languages : en
Pages : 105
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Book Description
TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 3: Highway/Heavy Vehicle Interaction reports on the safety interactions of commercial trucks and buses with highway features and on highway improvements that can be made to improve the safety of heavy vehicle operations.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 992
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Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 100
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Author: Ronald W. Eck
Publisher:
ISBN:
Category :
Languages : en
Pages : 570
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Author: Dan R. Middleton
Publisher:
ISBN:
Category : Detectors
Languages : en
Pages : 168
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Book Description
Providing effective roadside warning devices for drivers of large trucks is critical on freeway connectors where speeds are relatively high but design speeds may be substantially less than on mainlanes. Identifying and testing appropriate methods of monitoring traffic on freeway connectors was also included in this research. Two monitoring systems evolved, one using roadway sensors and the other using roadside sensors. Roadway sensors consisted of both piezoelectric and inductive loop sensors, while roadside sensors applied infrared sensor technology. The roadway warning devices tested can be categorized as passive devices and active devices. Passive devices consisted of "truck tipping" warning signs, while the active device consisted of flashing lights mounted one above and one below a set of passive truck tipping signs on both sides of the roadway. Speed reduction, as associated with accident reduction, was the ultimate goal of these tests. The null hypothesis tested by ANOVA of no treatment effect in the presence of initial speed was rejected in all but one of four models, using the probability of a Type I error, $\\\\alpha, $ equal 0.05. Speed reductions due to the active system were significant in AC and BC data sets, but not in AB data sets, suggesting that truck driver response to the lights occurred downstream of Location B. Truck weights were not significant in any tenable test results, and separation of trucks into the categories of combination and non-combination trucks, peak/off-peak periods, and day/night/dusk periods was not helpful in understanding variations in truck speeds. Cumulative speed distributions showed that the fastest trucks decreased their speeds by approximately 2 to 3 mph (3 to 5 kph) during the test period. Five of the seven single-vehicle truck accidents that were recorded on the I-610/US-59 connector in an 8 1/2 year period that were speed-related resulted in rollover. None occurred after installation of warning treatments being tested, although there were other prior years with no recorded accidents
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 236
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Book Description
Author: United States. National Transportation Safety Board
Publisher:
ISBN:
Category : Transportation
Languages : en
Pages : 96
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