Research Article
Two Stop-Line Method for Modern T-Shape Roundabout: Evaluation of Capacity and Optimal Signal Cycle
Table 2
Left-turn capacity analysis of the proposed model.
| Signal cycle length | Aimsun simulator benchmark values (Pcu/h) | Model without considering internal space area | Proposed TLSR-2SL model considering internal space area | Improved ratio of accuracy level by using TLSR-2SL (%) | Results (Pcu/h) | Relative error (%) | Results (Pcu/h) | Relative error (%) |
| 60 | 293 | 304 | 3.8 | 305 | 4.1 | −0.4 | 75 | 413 | 318 | −23.0 | 375 | −9.2 | 13.9 | 90 | 406 | 329 | −19.0 | 459 | 13.1 | 5.9 | 105 | 489 | 337 | −31.1 | 494 | 1.02 | 30.1 | 120 | 523 | 346 | −33.8 | 538 | 2.9 | 30.9 | 135 | 474 | 349 | −26.4 | 496 | 4.6 | 21.9 | 150 | 397 | 351 | −11.6 | 425 | 7.05 | 4.6 | 160 | 426 | 354 | −16.9 | 404 | −5.16 | 11.7 |
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