In-Vehicle Evaluation of Milled Rumble Strips in Pre– and Post–Chip Seal Maintenance Periods

2017 ◽  
Vol 2612 (1) ◽  
pp. 47-59
Author(s):  
Ernest O. A. Tufuor ◽  
Laurence R. Rilett ◽  
Phil TenHulzen
Keyword(s):  
Noise And Vibration ◽  
Vehicle Noise ◽  
Pavement Maintenance ◽  
Lane Departure ◽  
Chip Seal ◽  
Design Depth ◽  
Chip Sealing ◽  
The Relationship ◽  
Rumble Strip ◽  
Shoulder Rumble Strips

Driver fatigue and drowsiness can have a profound impact on safety. Centerline and shoulder rumble strips are popular countermeasures designed to produce audible and tactile warning when vehicles deviate from the travel lane onto the rumble strips. These warnings reduce the risk of lane departure crashes. Studies show that the noise produced by rumble strips is a function of many variables. Rumble strip depth is known to have the greatest impact in alerting drivers. However, chip seal pavement maintenance operations tend to reduce the original rumble strip design depth, which may have an impact on the functional effectiveness of the rumble strips. The purpose of this study was to conduct a controlled experiment to understand the relationship between milled rumble strip depth and noise and vibration in the vehicle cab. In-vehicle noise and vibration levels were collected on rumble strips of five depths (⅛, ¼, ⅜, ½, and ⅝ in.) and three types (shoulder, single centerline, and double centerline) on three highways in the state of Nebraska by two vehicles traveling at speeds of 45, 55, and 65 mph. Rumble strip depths at ⅛-in. intervals were used to simulate the influence of a chip seal on rumble strip effectiveness. From the in-vehicle sound and vibration levels of all the tested rumble strip depths, it can be hypothesized that a ⅛-in. reduction in the current milled rumble strip design depth, as a result of chip sealing, would not cause a practical reduction in the effectiveness of rumble strips producing audible and tactile warnings to alert drivers.

Enhancement of Eye Motor Response and Electrical Brain Activity during Noise and Vibration in Rabbits

1982 ◽  
Vol 90 (1) ◽  
pp. 130-138 ◽  
Author(s):  
Ilmari Pyykkö ◽  
Izuru Matsuoka ◽  
Shinsuke Ito ◽  
Manabe Hinoki
Keyword(s):  
Motor Response ◽  
Optokinetic Nystagmus ◽  
Dorsal Hippocampus ◽  
Brain Activity ◽  
Noise And Vibration ◽  
Implanted Electrodes ◽  
Theta Waves ◽  
Electrical Brain Activity ◽  
The Relationship ◽  
Electroencephalogram Eeg

The relationship between electroencephalogram (EEG) and eye movements was studied in rabbits during optokinetic, vestibular, and optovestibular tests. EEG was recorded through permanently implanted electrodes. Exposure to noise and vibration increased the frequency and the velocity of optokinetic nystagmus (OKN). The increase was greater during vibration but greatest during combined noise and vibration. EEG activity was closely linked to changes in OKN and was particularly evident with the appearance of theta waves in the dorsal hippocampus. Also, rotation of the rabbit produced considerable activation in the EEG.

scholarly journals The relationship between psychomotor efficiency and selected personality traits of people exposed to noise and vibration stimuli

2017 ◽  
Vol 199 ◽  
pp. 200-205 ◽  
Author(s):  
Aleksander Korchut ◽  
Wojciech Korchut ◽  
Alicja Kowalska-Koczwara ◽  
Anna Romanska – Zapała ◽  
Krzysztof Stypula
Keyword(s):  
Personality Traits ◽  
Noise And Vibration ◽  
Psychomotor Efficiency ◽  
The Relationship

scholarly journals Thermal Exchange and Skid Resistance of Chip Seal with Various Aggregate Types and Morphologies

2020 ◽  
Vol 10 (22) ◽  
pp. 8192
Author(s):  
Minghua Wei ◽  
Shaopeng Wu ◽  
Peide Cui ◽  
Tianyuan Yang ◽  
Yang Lv
Keyword(s):  
Steel Slag ◽  
Basic Oxygen Furnace ◽  
Spherical Particles ◽  
Skid Resistance ◽  
Retention Performance ◽  
Thermal Exchange ◽  
Pavement Maintenance ◽  
Chip Seal ◽  
Alternative Material ◽  
Bof Slag

Steel slag, the by-product of steelmaking, is a desirable alternative material for natural aggregate. However, there are few studies applying steel slag in the preventive maintenance of asphalt pavements, especially chip seal. The main objective of this study is to explore the feasibility of applying steel slag in chip seal and the effect of steel slag on the thermal exchange and aggregate retention properties. Furthermore, the surface features, including texture depth and skid resistance. of chip seal were also evaluated. The results show that the thermal exchange performances of chip seal vary with aggregate types. The ranking of the chip seal samples according to the cooling rate places ferrochromium (FER) slag as the fastest and basic oxygen furnace (BOF) slag as the slowest, with the basalt (BS) falling in between. The use of FER slag can make the chip seal resume traffic about ten minutes earlier than original samples. The skid resistance and texture depth of FER slag meet the requirements of the specification, although they are less than those of ordinary aggregates. Moreover, FER slag has a better aggregate retention performance than BOF slag and BS due to its spherical particles and alkaline surface. The application of steel slag in chip seal can recycle industrial waste, reduce the consumption of natural resources and promote economic pavement maintenance technology.

Development of Emulsion Residue Testing Framework for Improved Chip Seal Performance

2012 ◽  
Vol 2293 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Andrew J. Hanz ◽  
Petrina Johannes ◽  
Hussain U. Bahia
Keyword(s):  
Test Methods ◽  
Pavement Preservation ◽  
Testing Framework ◽  
State Highway ◽  
Low Volume Roads ◽  
Chip Seal ◽  
Chip Seals ◽  
And Performance ◽  
State Highway Agencies ◽  
The Relationship

To promote sustainability and optimize funding, state highway agencies are integrating pavement preservation strategies into the management of their roadway networks. Chip seals, a prominent pavement preservation alternative, are traditionally being used on low-volume roads with success in many states. However, as advancements in emulsion formulations continue and the use of chip seals on medium- and high-traffic facilities becomes more prevalent, there is a need to improve the methods to select and specify chip seal emulsions. The objective of this study was to develop an emulsion testing framework that captured properties related to critical distresses observed for in-service chip seals and considered the effects of traffic, environment, and aging. The proposed testing framework recommended the use of the dynamic shear rheometer and bitumen bond strength test to evaluate high-, intermediate-, and low-temperature performance. The testing protocols were applied to recovered and pressure aging vessel–aged emulsion residues from six emulsions widely used in Wisconsin, which included two emulsifier chemistries and two types of modification. The base binders before emulsification were also tested to assess the effects of the emulsification process. Results indicated that the proposed test methods could characterize material performance and differentiate between emulsion types and types of modification; however, additional research is needed to establish the relationship between laboratory-measured residue properties and performance of the full chip seal.

The Analysis of Acoustic Noise and Vibration Generated by the Multi-Layer Ceramic Capacitor

2013 ◽  
Author(s):  
Byung-Han Ko ◽  
Sang-Geuk Jeong ◽  
Young-Pil Park ◽  
Kyoung-Su Park ◽  
No-cheol Park
Keyword(s):  
Dynamic Characteristics ◽  
Acoustic Noise ◽  
Circuit Board ◽  
Noise And Vibration ◽  
Modal Test ◽  
Ceramic Capacitor ◽  
Ceramic Capacitors ◽  
Noise Test ◽  
The Relationship

In this study, we analyze the acoustic noise generated by multi-layer ceramic capacitors with the modal test and acoustic noise test. And the relationship between dynamic characteristics of circuit board and acoustic noise was investigated.

Effect of Continuous Shoulder Rumble Strips and Pavement Marking on Lateral Placement of Vehicles

2005 ◽  
Vol 1911 (1) ◽  
pp. 105-112
Author(s):  
William C. Taylor ◽  
Ghassan Abu-Lebdeh ◽  
Sachin Rai
Keyword(s):  
Department Of Transportation ◽  
Pavement Markings ◽  
Construction Joint ◽  
Potential Damage ◽  
Pavement Marking ◽  
Rumble Strip ◽  
Shoulder Rumble Strips

Shoulder rumble strips and enhanced pavement markings were two key areas identified by AASHTO to reduce runoff-road collisions. The Michigan Department of Transportation is currently testing the effectiveness of placing shoulder rumble strips close to the edge of travel lanes and painting a line on the rumble strip to improve the retroreflective properties of the line. Two issues arise from placing the rumble strips closer to the edge line and moving the paint line onto the rumble strip: the potential increased noise when vehicles crossed over the rumble strips and damage to the pavement if vehicles moved closer to the construction joint between the travel lane and the shoulder. This study found that simply moving the paint line onto the rumble strips resulted in vehicles moving slightly closer to the edge of the travel lane. However, maintaining the current edge line and adding an additional paint line on the rumble strip resulted in vehicles moving away from the edge of the pavement and thus reduced noise and potential damage to the pavement.

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