A Modular, Adaptive, and Autonomous Transit System (MAATS): A In-motion Transfer Strategy and Performance Evaluation in Urban Grid Transit Networks
Journal article, 2021

Dynamic traffic demand has been a longstanding challenge for the conventional transit system design and operation. The recent development of autonomous vehicles (AVs) makes it increasingly realistic to develop the next generation of transportation systems with the potential to improve operational performance and flexibility. In this study, we propose an innovative transit system with autonomous modular buses (AMBs) that is adaptive to dynamic traffic demands and not restricted to fixed routes and timetables. A unique transfer operation, termed as “in-motion transfer”, is introduced in this paper to transfer passengers between coupled modular buses in motion. A two-stage model is developed to facilitate in-motion transfer operations in optimally designing passenger transfer plans and AMB trajectories at intersections. In the proposed AMB system, all passengers can travel in the shortest path smoothly without having to actually alight and transfer between different bus lines. Numerical experiments demonstrate that the proposed transit system results in shorter travel time and a significantly reduced average number of transfers. While enjoying the above-mentioned benefits, the modular, adaptive, and autonomous transit system (MAATS) does not impose substantially higher energy consumption in comparison to the conventional bus system

Nonlinear programming

Autonomous modular bus

Public transit system


Jiaming Wu

Chalmers, Architecture and Civil Engineering, GeoEngineering

Balázs Adam Kulcsár

Chalmers, Electrical Engineering, Systems and control

Selpi Selpi

Chalmers, Computer Science and Engineering (Chalmers), Data Science

Xiaobo Qu

Chalmers, Architecture and Civil Engineering, GeoEngineering

Transportation Research Part A: General

0191-2607 (ISSN)

Vol. 151 81-98

RHEA: Demand-supply asymmetRy mitigation witH modular Electric bus plAtforms

Chalmers, 2021-01-01 -- 2022-12-31.

OPerational Network Energy managemenT for electrified buses (OPNET)

Swedish Energy Agency (46365-1), 2018-10-01 -- 2021-12-31.

Sustainable mixed urban transit system with electric and conventional buses

Swedish Energy Agency (SMUrTS), 2019-02-01 -- 2022-01-31.

European Commission (EC) (SMUrTS), 2019-04-01 -- 2022-03-31.

Public transit shared mobility - connected and safe solutions

Chalmers, 2019-03-01 -- 2020-02-29.

Chalmers, 2020-03-01 -- 2021-03-01.

Areas of Advance


Subject Categories

Transport Systems and Logistics

Embedded Systems



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8/5/2021 7