Michael Dudley

<p>Across the country, burst, leaking and corroding water mains are indications that much of the country's water infrastructure is reaching the end of its life expectancy. Repairs and replacements could cost hundreds of billions of dollars.</p>

<p>Popular Mechanics offers a slide show of the nation's top 10 most pressing infrastructure problems needing urgent attention.</p>

<p>Over 100 years ago, a wooden bicycle highway linked Pasadena to Los Angeles. Now cycling activists are hoping that, by closing the Arroyo Seco Parkway to automobiles for "ArroyoFest," Angelinos can once again imagine a cycling future for LA.</p>

<p>When it came out in 2004, "The End of Suburbia" was required viewing for anti-sprawl activists. Now, four years later, the film is both quaint and frighteningly prophetic, writes Dorothy Woodend.</p>

<p>Ruben Anderson suggests that if automobile parking could be kept to properties, that could free up the former on-street parking to become Garden Streets, so that cities could grow much more of their own produce.</p>