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The shoulder is usually slightly narrower than a full traffic lane. In some cases, particularly on older rural roadways, shoulders that initially existed were hardened with gravel rather than being paved with asphalt, tarmac or concrete. In Britain, motorway shoulders are now paved, but are still known as "hard shoulders".
This section addresses two-lane freeways and other narrow or undivided freeway sections of the Interstate, excepting instances of continuing routes using one-lane ramps and merge leads. Narrow gaps between opposing directions with jersey barriers taller than four feet (1.2 m) are excluded from this section; therefore the separation criterion is ...
Almost all before-and-after studies are based on Interstate (freeway, turnpikes, thruways) test sites have minimum 12-foot (3.7 m) paved shoulders and very high crash rates due to inattention. The collision reduction attributed to the installation of CSRS is mainly a function of stable shoulder width, crash rate and profile, climate and ...
Longer bridges can reduce the width of both shoulders to 4 feet (1.2 m). Existing bridges can remain part of the Interstate system if they have at least 12-foot-wide (3.7 m) lanes with 3.5-foot (1.1 m) shoulder on the left and a 10-foot (3.0 m) shoulder on the right, except that longer bridges can have 3.5 feet (1.1 m) shoulders on both sides.
Yes, Texas law allows motorists to drive on “improved” or paved shoulders in certain circumstances. Under Texas Transportation Code section 545.058 , motorists are allowed to drive on the ...
strada extraurbana principale (meaning main highway) or type-B road: a road with separate carriageways, at least two lanes for each direction, paved shoulder on the right and no cross-traffic. This type of road is quite similar to an autostrada or type-A road (Italian official name for motorways or freeways), but its building standards are ...
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The highway was designed with two 11–12-foot (3.4–3.7 m) lanes and one 10-foot (3.0 m) shoulder in each direction, with the wider inside (passing) lanes paved in black asphalt concrete and the outside lanes paved in white Portland cement concrete. The differently-colored lanes would encourage drivers to stay in their lanes.