Railroad Capacity Issues

MD02.1 Modeling Slotted Operation on Single Track

• Bill Richardson; Canadian Pacific Railway, 401 9th Ave. SW, Desk F4134, Calgary, Alberta, T2P 4Z4 , Canada; bill_richardson@cpr.ca

Models of the relationship between transit time, slot frequency and inter-siding spacing will be explored. In certain situations, the slot frequency can 'resonate' with the track layout to give smaller train delay.

MD02.2 Estimating the Capacity of Railroad Terminal Complexes

• Carl D. Martland; MIT, Dept. of Civil & Environ. Eng., Cambridge, MA 02139; martlan@mitvma.mit.edu

Most models of rail capacity deal with line capacity; a few deal with yard capacity; almost none deal with complex terminals. We will describe TERMCAP, a spreadsheet model designed to estimate the capacity of a terminal area where a half dozen mainlines converge upon a number of classification yards, intermodal yards and industrial support facilities.

MD02.3 The Mainline/Yard Interface

• Bill Vanmarter; Canadian Pacific Railway, 401 9th Ave. SW, Desk F4135, Calgary, Alberta, T2P 4Z4 , Canada; bill_vanmarter@cpr.ca

Railroad mainline capacity is necessarily analyzed at train level. Yard capacity is usually analyzed separately in terms of blocks and cars. Identifying root causes of bottlenecks from a network perspective requires a common ground between mainline and yards. We present a simulation approach to this problem.