All schematics are preliminary except as noted.
The settlement of a smog-related lawsuit has averted a cutoff of federal transportation funds to the Houston area, officials said Wednesday. But the environmental groups and individuals who filed the suit have decided to drop it, the Environmental Protection Agency announced. To settle the lawsuit, the EPA agreed to declare that local transportation plans must adhere to a vehicle pollution limit in the state's latest smog reduction plan for Houston. The environmentalists had sued the EPA because it approved last year the use of a higher vehicle pollution number for use in planning new roads and other transportation projects. EPA officials knew when they signed off on the higher number that the state's smog plan would include a lower figure just a few months later, but the plan had not yet been adopted.