Re: [sumo-user] Questions regarding traffic lights control with the goal

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

1. Yes. The latest development version supports retrieval of public transport (arrival) delay when defining custom switching rules: https://sumo.dlr.de/docs/Simulation/Traffic_Lights.html#type_actuated_with_custom_switching_rules

2. Yes. You can define and assign custom detectors to a delay_based traffic light. Custom detectors permit filtering by vType. However, the "delay" in the name is not related to public transport delay but to vehicles driving slower than desired.

3. Yes. If the API functions for implementing custom switching rules https://sumo.dlr.de/docs/Simulation/Traffic_Lights.html#type_actuated_with_custom_switching_rules are insufficient for your purpose you can attach arbitrary programs to a running simulation using TraCI: https://sumo.dlr.de/docs/Simulation/Traffic_Lights.html#controlling_traffic_lights_via_traci

regards,

Jakob

Am Mo., 4. Mai 2026 um 15:15 Uhr schrieb Salvado, João Alexandre via sumo-user <sumo-user@xxxxxxxxxxx>:

Hello,

We have a couple of questions pertaining the control and customisation of traffic lights in a relatively simple grid. Our scenario contains right-most bus lanes and several intersections with traffic lights which we intend to tweak in order to optimise the delay of busses (eventually focusing on reducing the delay of the most delayed busses).

Our questions are as follows:

1. Is it possible, both for actuated and delay-based traffic lights, to detect individual busses and prioritise extending or hastening a green light in order to benefit the ones with the most delay (including situations where busses are competing for a green light due to travelling in intersecting directions)?
2. For delay-based traffic lights, is it possible at all to detect/filter the vehicle type?
3. Is it possible to employ a fully customised traffic lights controller (as in, not belonging to any of the existing types and being able to implement the TLS algorithm ourselves)?

Thank you in advance and wishes of a nice rest of the week.

Best regards.

JOÃO SALVADO Research Engineer   +351 914 047 591
VORTEX-CoLab in Cyberphysical Systems and Cybersecurity
Rua Serpa Pinto nº 28 44G e 44F  4400-307 Vila Nova de Gaia, PORTUGAL
www.vortex-colab.com

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