Research Article
Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length
Table 2
The accuracy test results.
| | Cycle length | VISSIM simulation
(benchmark) | Model without consideration of interval space constraint | model considering the interval space constraint
(proposed in this paper) | Improvement of model accuracy after considering internal space constraints | | Result | Relative error | Result | Relative error |
| | 60 | 297 | 310 | 4.38% | 311 | 4.71% | -0.34% | | 70 | 397 | 321 | -19.13% | 378 | -4.79% | 14.34% | | 80 | 438 | 329 | -24.80% | 428 | -2.28% | 22.52% | | 90 | 409 | 336 | -17.89% | 466 | 13.94% | 3.95% | | 100 | 475 | 341 | -28.21% | 498 | 4.84% | 23.37% | | 110 | 560 | 345 | -38.35% | 522 | -6.79% | 31.57% | | 120 | 517 | 349 | -32.54% | 541 | 4.64% | 27.90% | | 130 | 525 | 352 | -33.00% | 499 | -4.95% | 28.05% | | 140 | 456 | 354 | -22.31% | 463 | 1.54% | 20.77% | | 150 | 386 | 357 | -7.64% | 431 | 11.66% | -4.02% | | 160 | 437 | 358 | -17.98% | 408 | -6.64% | 11.34% |
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