This volume includes the papers presented at the North American Tunneling 2002 Conference. The papers deal with three major aspects of underground construction: managing construction projects; public policy and underground facilities; and advances in technology.

This publication includes papers from the North American Tunneling 2004 conference, sponsored by the American Underground Construction Association. The theme of the conference is "Underground Construction - the Sensible Solution to Urban Problems" to reflect the increasing importance of locating urban facilities in the United States underground for enhanced security, to build critical infrastructure where it is needed and to improve the function of urban areas. The papers are grouped in four major themes: - Management of Underground Projects - Public Policy and Underground Projects - Advances in Technology - Case Studies: Trials, Tribulation and Triumphs in Tunneling This work should benefit everyone involved in any aspect of infrastructure, tunneling and underground construction.

The 2002 North American Industry Classification System (NAICS), a classification system used for organizing economic data, is a revision to the classification systems currently used by Canada, Mexico and the United States. NAICS is revised as part of a five-year revision cycle in order to ensure that the classification continues to reflect the rapidly changing structure of our economies. In this revision, the Construction sector has been harmonized across the three countries, which was not the case in NAICS 1997, and the Information and Cultural Industries sector has been updated to take into account new industries arising from the emergence of the Internet. NAICS 2002 provides a common standard framework for the collection of economic and financial data for all three countries. NAICS 2002 groups economic activity into 20 sectors and 928 Canadian industries. This classification supersedes NAICS 1997.

A magnificent reference with the latest information on railroads past and present for anyone who was ever enthralled by the romance of the rails