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Analysis and design of nomographs for minimum headway calculation |
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| รหัสดีโอไอ | |
| Creator | 1. Onanong Sangphong 2. Siradol Siridhara 3. Vatanavongs Ratanavaraha |
| Title | Analysis and design of nomographs for minimum headway calculation |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2018 |
| Journal Title | Songklanakarin Journal of Science and Technology |
| Journal Vol. | 40 |
| Journal No. | 2 |
| Page no. | 457 |
| Keyword | block length, minimum deadway, nomographs, critical block, train schedule |
| URL Website | http://rdo.psu.ac.th/sjstweb/index.php |
| ISSN | 0125-3395 |
| Abstract | This study proposes the design and analysis of nomographs for minimum headway calculations using critical blocks toreduce the complexity of mathematical equations. For trains with different speeds, block overlapping should be checked forwardor backward in a looping manner, while nomographs simplify the analysis and eliminate iterations. Nomographs for headwaycalculation are constructed using Python scripts in PyNomo software. The associated variables include train speed, train length,and block length. Three nomographs are designed for three types of operation: Model 1 for cases wherein two trains have equalspeeds, Model 2 for those wherein the leading train is faster, and Model 3 for those wherein the leading train is slower. Thevalidation reveals that the nomographs yield minimum headways that are close to the result obtained by mathematical derivation.Data can be used to create a train schedule for safe operation without conflict. |
