All schematics are preliminary except as noted.
A dispute over Houston's long-range highway plan that threatens federal funding for upcoming road projects, including the Katy Freeway expansion, may be reignited as early as this week. Two groups, Environmental Defense and the Sierra Club, sued the U.S. Environmental Protection Agency last fall to force the strict standards upon local road planners. A court-ordered stay of that suit ends Thursday. Environmentalists say they are suing because the Houston region's plan essentially calls for too many new roads. More roads leads to more traffic, they say, which means more smog.