Trade-Offs Between Bus and Private Vehicle Delays at Signalized Intersections: Case Study of a Multiobjective Model
Bibliographic record
Abstract
Mixed road users on most urban arterials are controlled by the same set of signals and must compete for shared road space. Transit signal priority (TSP) systems have been established to improve transit service operations in mixed traffic. To balance the benefits of priority control with the negative effects, most existing adaptive TSP strategies normally use an integrated performance index, a weighted sum of all types of delays, for evaluation and optimization. In a previous study, the authors formulated the TSP optimization into a quadratic programming problem with an enhanced delay-based performance index to obtain global optimization. In this study, the problem was formulated into a multiobjective optimization model, which was solved with a nondominated sorting genetic algorithm. Pareto-optimal front results were presented to evaluate the trade-offs between two objectives: minimization of private vehicle delay and of bus delay. Then the most appropriate solution was chosen with high-level information. A simulation study was conducted along 7.4 km of a bus corridor, with an adaptive TSP simulation platform, by using a full-scale signal simulator, ASC/3, in Vissim. The results show that the Pareto-optimal solutions provided more interesting practical options for decision makers.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.005 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".