Research Article

A Long-Term Shared Autonomous Vehicle System Design Problem considering Relocation and Pricing

Table 1

Variables and parameters used in the daily operation problem model.

NotationsDescription

Parameters
NSet of zones, indexed as
TSet of time periods, indexed as t
The unit time-related price for SAV users
The unit value of time for SAV users
The unit value of time for CPV users
The parking cost for a CPV trip
ηDaily maintenance cost for an SAV
The total travel demand for SAVs and CPVs from origin to destination departure at time
The minimum customer service rate
The capacity of an SAV, which allows ride-pooling
The unit penalty cost for one unserved SAV demand
The unit fuel consumption cost
The shortest travel time from zone to zone at time in k-th period
The total fleet size
The number of parking spaces at zone

Decisions variables
The base price for a SAV trip
The number of occupied vehicles with passengers from zone to zone departure at time
The number of empty vehicles relocating from zone to zone at departure time

Auxiliary variables
The number of SAVs waiting at zone at the beginning of time
The probability of travelers choosing SAVs from zone to zone at time
The number of travelers who intend to employ SAVs from zone to zone at time
The number of travelers served actually by SAVs from zone to zone at time