Louis and Texas Elimination of bi-directional running was one of the big pay-offs in the UP-SP mergerĢ3 Maintenance Factors Track quality Inspection frequency High-volume route Each railroad was operating single track with passing sidings between St. Railway Capacity Analysis and Related Methodology. ST, siding every 21.4 miles bidirectional running, DT Delay (hours) directional running, DT Volume (trains/day) Kahn, Ata M. Siding spacing (distance & time) Crossover spacing Single crossovers Universal crossovers Parallel crossovers Length of bottleneck section Grade Curvature Philadelphia, 2012.ġ3 Important Factors of Railroad Capacityġ4 Meet and Pass Single track poses significantly more challenges for capacity No longer simply limited by train spacing Must consider “meets” of trains traveling in opposite direction These impose constraints on scheduleġ9 Track Configuration Number of tracks Siding length “Measuring the Impact of Additional Rail Traffic Using Highway & Railroad Metrics.” Proceedings of the 2012 Joint Rail Conference. Philadelphia, 2012.Īmount Moved Reliability Utilization Trains Cars Tons Revenue Tons People TEUs (Per Year) (Per Day) (Per Hour) (Per Peak Hour) Distribution of Arrival Times Average Delay Standard Deviation of Delay On Time Performance Right Car Right Train Crew Expirations Velocity Dwell time in Terminals Blocking Time Signal Wake Train Miles/Track Mile Cycle Time Sogin, Samuel L et al. Ottawa, Print.Īmount Moved Utilization Reliability Sogin, Samuel L et al. Transportation Network Railroad Network Division Subdivision Yards & Terminals Industry Facilitiesġ0 Types of Capacity Practical Capacity: Ability to move traffic at an “acceptable” level of service Economic Capacity: The level of traffic at which the costs of additional traffic outweighs the benefits Engineering Capacity: The maximum amount moved before the system ceases to function Ultimate Capacity: The system has ceased to function and all signals are red Kahn, Ata M. There are numerous needs for capital dollars to maintain and expand our network to handle growth. The rail industry is the most capital intensive industry when compared to other capital-intensive businesses.
RUN 8 TRAIN SIM CTC FLEETING WINDOWS
Inability to handle more traffic Decreasing level of service Diminished ability to recover from a disruption Limited windows for track maintenance Crew time limitations Increase time in yards Increase cycle times All of these increase costs National Rail Freight Infrastructure Capacity and Investment Study. Yard capacity Network capacity Scheduling Economics QuestionsĪnalytics Data mining Network optimization Queuing theory Regression modeling Risk modeling Simulation Utility modelsġ9th and early 20th century: Great expansion of railroads World War I: War traffic brought network to standstill due to insufficient capacity due to inefficient operations, 1920s: Relative balance between capacity and traffic levels Great Depression: Loss of traffic led to excess capacity World War II: Congestion from war traffic After WWII: Overcapacity as passenger and freight traffic declined Current: Growth in traffic and market power has permitted railroads to spend substantial amounts to remove choke pointsįreight Growth Low Cost Transportation Reliability Intercity Passenger Trains Environment Cambridge systematics study of 2030 freight traffic without improvements Commuter Service Cambridge Systematics. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.Ģ Outline Introduction Factors of capacity Mainline capacity Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. Sogin Graduate Research Assistant University of Illinois at Urbana-Champaign © 2007 Microsoft Corporation. 7:56 PM Introduction to Railroad Capacity Module 2-D Samuel L. 1 Introduction to Railroad Capacity Module 2-D