Princeton Architectural Press is once again seeking proposals for the next installment in its Pamphlet Architecture series. This time, however, it's not as open ended as previous calls for entries. They've got a theme: infrastructure.

At a time of new government leadership committed to investing in America's Infrastructure, architects, engineers, and artists should propose new directions for transportation, energy, and agriculture at a continental scale. In this spirit, no visionary dimension is too large, no inventive proposal too ambitious to consider.

(Emphasis ours.)

The deadline is July 1, 2009.