Discussion about cycle length, scheduling algorithm, and headways for flex-route feeder transit

Flex-route feeder transit is a promising way to improve the flexibility of first/last mile service. In this paper, we propose an optimal scheduling strategy which can provide immediate feedback to enhance the attraction of flex-route feeder transit. An improved cycle length model and a modified scheduling algorithm are proposed to guarantee the performance and the reliability of feeder system. Six indicators are employed to evaluate the performance of flex-route feeder transit from macroscopic and microcosmic aspects. Finally, simulation experiments with different system parameter values are conducted using the proposed model and algorithm. The results verify the validity of the optimal method and indicate that our optimal design for flex-route feeder transit can help the decision-makers best select from the transit modes in different situations.