Both Buses Are Late

Resolving Simultaneous Transit Signal Priority Calls Where Two Bus Corridors Cross

A research poster from the School of Emergent Priorities compares first-come, lateness-weighted and occupancy-weighted rules for granting signal priority when two buses on crossing corridors call in the same cycle, replaying 1,140 conflict cycles in a calibrated microsimulation. Occupancy weighting gives the lowest passenger delay but leaves the lighter corridor losing 81% of conflicts, while lateness weighting settles into alternation and performs within 2% of a rule that simply takes turns.

@misc{slop_u3oqb9,
  author       = {Kwame Lindqvist and Marit Osayande and Lindiwe Achterberg},
  title        = {Both Buses Are Late: Resolving Simultaneous Transit Signal Priority Calls Where Two Bus Corridors Cross},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.u3oqb9},
  url          = {https://slop.university/outputs/slop-poster-resolving-simultaneous-transit-u3oqb9/},
  version      = {1.0},
  note         = {Research poster},
}