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  2. Interstate Highway standards - Wikipedia

    en.wikipedia.org/wiki/Interstate_Highway_standards

    Special care should be taken in depressed highways, where piers and walls should be placed at least 2 feet (0.61 m) beyond the outer edge of either shoulder. Slopes in the clear zone should be at most 1:4, and should typically be 1:6. Curbs: No curb is to be placed nearer to the roadway than the outside edge of the paved shoulder. Any curb is ...

  3. Shoulder (road) - Wikipedia

    en.wikipedia.org/wiki/Shoulder_(road)

    A shoulder (American English), hard shoulder (British English) [1] or breakdown lane (Australian English) is an emergency stopping lane by the verge on the outer side of a road or motorway. Many wider freeways , or expressways elsewhere have shoulders on both sides of each directional carriageway—in the median, as well as at the outer edges ...

  4. Road signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_the_United...

    11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).

  5. Road hierarchy - Wikipedia

    en.wikipedia.org/wiki/Road_hierarchy

    Bundesautobahn 9 near by Garching bei Muenchen, Germany. At the top of the hierarchy in terms of traffic flow and speed are controlled-access highways; their defining characteristic is the control of access to and from the road, meaning that the road cannot be directly accessed from properties or other roads, but only from specific connector roads.

  6. Is driving on the shoulder to let faster vehicles pass you ...

    www.aol.com/news/driving-shoulder-let-faster...

    Yes, the above limitations on driving on a paved shoulder do not apply to: Emergency vehicles responding to a call. Police patrol. Bicyclers. Slow-moving vehicles such as golf carts.

  7. Geometric design of roads - Wikipedia

    en.wikipedia.org/wiki/Geometric_design_of_roads

    When determining corner sight distance, a set back distance for the vehicle waiting at the crossroad must be assumed. Set back for the driver of the vehicle on the crossroad has been standardized by some state MUTCDs and design manuals to be up to a minimum of 10 feet plus the shoulder width of the major road but not less than 15 feet. [22]

  8. Clearance (civil engineering) - Wikipedia

    en.wikipedia.org/wiki/Clearance_(civil_engineering)

    In civil engineering, clearance refers to the difference between the loading gauge and the structure gauge in the case of railroad cars or trams, or the difference between the size of any vehicle and the width/height of doors, the width/height of an overpass or the diameter of a tunnel as well as the air draft under a bridge, the width of a lock or diameter of a tunnel in the case of watercraft.

  9. Dual carriageway - Wikipedia

    en.wikipedia.org/wiki/Dual_carriageway

    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 lower.