CN reaches voluntary mitigation agreement with the City of Warrenville, Ill.

CN now has agreements with more than half of the communities along the EJ&E

CHICAGO, June 18, 2009 — CN (TSX: CNR)(NYSE: CNI) announced today a voluntary mitigation agreement (VMA) with the City of Warrenville, Ill., located approximately 30 miles west of Chicago, addressing the municipality's environmental issues with CN's acquisition of the principal lines of the former Elgin, Joliet and Eastern Railway Company (EJ&E). CN completed the acquisition on Jan. 31, 2009, and is running trains over the line.

Under the agreement with Warrenville, CN will provide funding for the creation of a quiet zone, noise mitigation and emergency response training.

CN now has VMAs with 17 municipalities, more than half of the 33 villages and municipalities along the EJ&E in Illinois and Indiana.

CN expects that full integration of the CN and EJ&E networks will be accomplished within three years. CN has been actively engaged with all the communities along the EJ&E line in connection with integration and mitigation activities as well as planned infrastructure improvements. CN will continue to communicate changes in a timely manner to the communities affected by the acquisition.

More information on the acquisition, including a map of the areas served by the EJ&E and CN, is available on CN's website.

Forward-Looking Statements
This news release contains forward-looking statements. CN cautions that, by their nature, forward-looking statements involve risk, uncertainties and assumptions. Implicit in these statements, particularly in respect of long-term growth opportunities, is the Company's assumption that such growth opportunities are less affected by the current situation in the North American and global economies. The Company cautions that its assumptions may not materialize and that the current economic conditions render such assumptions, reasonable at the time they were made, subject to greater uncertainty. The Company cautions that its results could differ materially from those expressed or implied in such forward-looking statements. Important factors that could cause such differences include, but are not limited to, the effects of adverse general economic and business conditions, including the current deep recession in the North American economy and the possibility of a global economic contraction in 2009, industry competition, inflation, currency fluctuations, changes in fuel prices, legislative and/or regulatory developments, compliance with environmental laws and regulations, various events which could disrupt operations, including natural events such as severe weather, droughts, floods and earthquakes, labour disruptions, environmental claims, investigations or proceedings, other types of claims and litigation, and other risks detailed from time to time in reports filed by CN with securities regulators in Canada and the United States. Reference should be made to “Management's Discussion and Analysis” in CN's annual and interim reports, Annual Information Form and Form 40-F filed with Canadian and U.S. securities regulators, available on CN's website, for a summary of major risks.