The gas drainage methods, which include roadways, surface wells, boreholes drilled from gob side retained roadways, and buried pipes in the gob, are applied to control gas emissions during mining coupled with Y-type ventilation (Yuan 2008b).
Along the Gin River, flood waters inundated the surrounding terrain up to 2 m deep, which covered roadways and complicated evacuations.
Perhaps of most immediate concern to many opposed are the trains, barges and ships themselves, which block roadways for emergency vehicles, belch diesel fumes and blow coal dust.
SR 503 between Orchards and Battle Ground is designated as part of the National Highway System, which includes roadways important to the national economy, defense, and mobility.
The entire route is designated as part of the National Highway System, which includes roadways important to the national economy, defense, and mobility.
It initially travels through dense urban areas by way of a cut, in which both roadways are separated only by a Jersey barrier.
SR 509 between SeaTac and Seattle is designated as part of the National Highway System, which includes roadways important to the national economy, defense, and mobility.
SR 516 between I-5 and SR 167 within western Kent is designated as part of the National Highway System, which includes roadways important to the national economy, defense, and mobility.
SR 3 is designated as a STRAHNET corridor within National Highway System, connecting Naval Base Kitsap to the state highway system between Gorst and Bangor, while the rest of the highway is part of the system, which includes roadways important to the national economy, defense, and mobility.
Four man-made islands, constructed in water averaging 40 feet (12 m) in depth, provide portals by which the roadway enters the tunnels.
