This paper presents the pessimistic time complexity analysis of the parallel algorithm for minimizing the fleet size in the pickup and delivery problem with time windows. We show how to estimate the pessimistic complexity step by step—this approach can be easily adopted to other parallel algorithms for solving complex transportation problems.

The Center for the Management of Information (CMI) at the University of Arizona worked with the US Navy Commander, Third Fleet (Third Fleet) to overcome limitations of performing closely coordinated staff work on board a US Navy ship. Third Fleet is required to collaborate with hundreds of people internally and with military and civilian organizations both nationally and internationally. Third ...

Making decisions about the structure of a future military fleet is challenging. Several issues need to be considered, including multiple competing objectives and the complexity of the operating environment. A particular challenge is posed by the various types of uncertainty that the future holds. It is uncertain what future events might be encountered and how fleet design decisions will influen...

BACKGROUND Workers onboard freezer-trawl (FT) and freezer-longline (FL) vessels in Alaska may be at high risk for fatal and non-fatal injuries. METHODS Traumatic occupational injuries onboard vessels in the FT and FL fleets were identified through two government data sources. RESULTS The annual risk of fatal injuries was 125 per 100,000 FTEs in the FT fleet, and 63 per 100,000 FTEs in the F...

On-road remote sensing data is an increasingly popular source of evaluation information for vehicle inspection/maintenance (I/M) programs. This article conducts one such remote sensing data evaluation for the Atlanta, Georgia, I/M program. The reference method involves comparing emissions differences in I/M and non-I/M fleet vehicles with those predicted by a regulatory computer model. Assuming...

Parking is a crucial element of the driving experience in urban transportation systems. Especially coming era Shared Autonomous Vehicles (SAVs), parking operations networks may inevitably change. stations are likely to serve as storage places for unused vehicles and depots that control level-of-service SAVs. This study presents an Analytical Planning Model (APPM) SAV environment provide broader...