The future of the Tappan Zee Bridge will be a prime topic this morning when county executives from Westchester, Rockland and Putnam counties hold a roundtable discussion at a conference at the Double Tree Hotel in Tarrytown.

In his State of the County address Wednesday night, Westchester County Executive Robert Astorino called for bus rapid transit to be included as a component of the estimated $5.2 billion bridge project, which is being fast-tracked by the Obama administration and New York Gov. Andrew Cuomo.

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Joining Astorino will be Putnam County Executive MaryEllen Odell and Rockland County Executive C. Scott Vanderhoef.

Other topics will include economic development and fiscal challenges facing county governments.

Hudson Valley Pattern for Progress, a not-for-profit advocacy group, organized the session.