Operational Strategies

The modular design of POLARIS enables customizing service configurations as well as operational strategies.

Strategy Categories

POLARIS supports different operational policies for shared mobility services. They can be categorized as:

• Assignment

• Repositioning

• Fare Setting

• Charging

• Parking

• Maintenance/Cleaning

The combination of each of these strategies together decide the operational policy followed by the vehicles and operator. Modelers must specify the strategy in the fleet model file that needs to be used. Examples are shown in the Fleet Model File.

Implemented Strategies

The table below lists the strategies currently implemented in the shared mobility module. The POLARIS team continuously develops new strategies and enhances existing ones, both in-house and in collaboration with other institutions.

ℹ️ NOTE Documentation for some strategies are in progress and will be added soon

Name	Type of Strategy	Description	Requirements	Partners
Default	All	All-encompassing set of strategies provided by Argonne		UT Austin
DRS Iterative Assignment	Assignment	Iterative passenger-vehicle assignment strategy for pooling	CPLEX; KDTREE
Charging and Repositioning	Joint	Optimization-based idle vehicle dispatch strategy for repositioning & charging	GLPK; CPLEX	UT Austin
Corner-to-Corner	Assignment	Corner-to-Corner passenger-vehicle and pickup/drop-off (PUDO) link assignment strategy	CPLEX	UCI
Day ahead charging	Charging	Optimization-based idle vehicle dispatch strategy for repositioning, charging, discharging & maintenance	CPLEX	UT Austin
ODMTS	Assignment	Assignment strategy in for on-demand mulitmodal transit systems (OMTS)		GTech
Stable Matching	Assignment	Stable-matching strategy that takes into account vehicle and rider preferences
Dynamic Fare	Pricing	Fare-related strategy to dynamically set fares by time of day or zone-based surges, for different service types		UT Austin
AlonsoMora	Assignment	DRS matching strategy by Alonso-Mora et al.
DLL	All	Pre-compiled dynamically-linked library allowed to be used to control fleets within POLARIS

• Assignment Strategies
  • Default Strategy
  • Iterative Assignment for Pooling Strategy
  • Dynamically-Linked Library-Based Strategy
  • Corner-to-Corner (C2C) Strategy
  • Stable-Matching Algorithm
  • Alonso-Mora et al. DRS Matching Strategy
• Repositioning Strategies
  • Default Strategy
  • Joint EV Charging and Repositioning Strategy
• Charging Strategies
  • Default Strategy
  • Joint EV Charging and Repositioning Strategy
  • Day Ahead Charging Strategy
• Fare Strategies
  • Default Strategy
  • Dynamic Fare Strategy
• Parking Strategies
  • Default Strategy