Evaluation of Operating Speed at Multilane Highway Along Jalan Meru: Case Study of Reliability of Posted Speed Limit

InCIEC 2015 ◽  
2016 ◽  
pp. 995-1006 ◽  
Author(s):  
Ab Mughni B. Ab Rahim ◽  
Muhammad Akram Bin Adnan ◽  
S. Z. Zamalik ◽  
F. Jamali ◽  
M. Mohammad ◽  
...  
Keyword(s):  
Speed Limit ◽  
Operating Speed

An evaluation of 85th operating speed and posted speed limit based on horizontal, vertical alignments and traffic conditions: Case study of two lane urban roadway

2018 ◽  
pp. 377-380
Author(s):  
Azim Muiz Abu Bakar ◽  
Mohamad Saharol Nizam Abdul Rani ◽  
Rozlinda Mohamed ◽  
Nur Suhadah Sani ◽  
Nurjannah Jalal ◽  
...  
Keyword(s):  
Speed Limit ◽  
Operating Speed ◽  
Traffic Conditions

An evaluation of 85th operating speed and posted speed limit based on horizontal, vertical alignments and traffic conditions: Case study of two lane urban roadway

2016 ◽  
pp. 375-380
Author(s):  
Azim Muiz Abu Bakar ◽  
Mohamad Saharol Nizam Abdul Rani ◽  
Rozlinda Mohamed ◽  
Nur Suhadah Sani ◽  
Nurjannah Jalal ◽  
...  
Keyword(s):  
Speed Limit ◽  
Operating Speed ◽  
Traffic Conditions

Evaluation of Expressway Alignment Coordination Based on Operating Speed: A Case Study of Suiyan Expressway

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Shan-Shan Liu ◽  
Jian-Jun Wang ◽  
Xue-Qin Long ◽  
Lian-Cai Zhang
Keyword(s):  
Operating Speed

The Use of Interference Diagrams to Avoid Impeller Resonance: An Application to IGV Design

2009 ◽  
Author(s):  
Marco Ferioli
Keyword(s):  
Centrifugal Compressor ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Common Source ◽  
Operating Speed ◽  
Element Analysis ◽  
Exciting Frequency ◽  
Combine Information ◽  
The Impact

Interference diagrams can be used to avoid the potential excitation of a particular mode of vibration for centrifugal compressor impellers, thus reducing the risk of fatigue failures. Such diagrams are an excellent tool to combine information on impeller natural frequencies and mode shapes, excitation sources and operating speed of the machine on the same graph. Once the impeller design has been finalized in terms of aerodynamic performance, structural assessments and therefore geometry, Finite Element Analysis can be used to predict its natural frequencies and mode shapes (i.e. nodal diameters). Results can therefore be shown on a chart, together with the operating speed range of the machine. The need to plot on a single diagram this whole set of data arises from the mathematical evidence to consider the frequency of vibration together with the mode shape and the shape of the exciting force, while analyzing resonances. Typical Campbell diagrams are unable to provide this information at a glance. A common source of excitation for the first impeller of centrifugal compressors is the IGV set. Inlet Guide Vanes produce an exciting frequency that is directly proportional to the number of vanes N, where N represents also the shape of the excitation. The interference diagram can therefore be used: • to design and optimize the IGV for a new machine; • to choose between two different designs; • to evaluate the impact of a new IGV for the impeller of an existing compressor. A case study will be introduced, in order to show the application of interference diagrams to avoid potentially dangerous resonances between an IGV set and the first impeller during the re-design phase for a centrifugal compressor already in operation.

Characteristics of Operating Speed for Proper Speed Limit

ICCTP 2010 ◽  
2010 ◽  
Author(s):  
Xiaoduan Sun ◽  
Yulong He ◽  
Shuangjie Wang ◽  
Yiyi Wang
Keyword(s):  
Speed Limit ◽  
Operating Speed

scholarly journals ROAD SAFETY AWARENESS AMONG UNIVERSITY STUDENTS: CASE STUDY AT MALAYSIA UNIVERSITI TUN HUSSEIN ONN MALAYSIA, JOHOR

2021 ◽  
Vol 12 (1) ◽  
pp. 56-65
Author(s):  
R. Abd Rahman ◽  
H. A. Mazle ◽  
W. M. Lim ◽  
M. I. Mohd Masirin ◽  
M. F. Hassan
Keyword(s):  
University Students ◽  
Road Safety ◽  
Speed Limit ◽  
The Road ◽  
Young Drivers ◽  
Road Signs ◽  
Road Sign ◽  
Safety Awareness ◽  
On The Road

This descriptive study aims to assess the knowledge and awareness of road safety among university students. The study was conducted among students in Universiti Tun Hussein Onn Malaysia by means of questionnaire disseminated online via social media with shareable link to a Google form. The respondents were self-selected to participate in this study where their responses were self-administrated. Questionnaire consisted of 3 sections included demographic information, knowledge on road signs and road safety law, and road safety awareness. 371 students participated in this study, 66% of them age 23 to 27 years old, 61% were female, 92.5% of respondents have at least one type of license with majority agreed that occurrence of accidents resulted in an increase in road safety awareness. The study found that more than half of the participants could not recognise road sign like parking totally prohibited and speed limit ends here. While, 38% of them correctly identified posted speed limit for expressway. Overall, participants have fair understanding on road safety. Therefore, road safety programmes and education are still relevant to university students as young drivers on the road which is important to increase safety awareness.

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