The road signs are usually located on top and some have lights to indicate open or closed lanes. Hong Kong's highways use a gantry crane type to support signs. In New Brunswick, the opposite is true: signs are angled slightly face-up to capture and reflect more sunlight towards the roadway.
In Québec, however, signs are angled slightly face-down towards the roadway such that the sign face is directed towards the motorists below. In most jurisdictions in Canada, signs that are mounted on overhead gantries are installed perpendicular to the roadway. Older gantries have truss supports (round or box) and newer ones are now supported by cylindrical legs. The style of gantry used are mostly truss gantries. Gantries can also be used to hold cameras for toll road entrances/exits and to hold electronic information signs, such as on Ontario Highway 407. Half-gantries are used to place signs near exits where space does not permit having signs to the right side of the roadway. Gantry signs are commonly used in urban highways in Canada to support overhead signs. Similar gantries are used in railway signalling or to suspend overhead lines on multi-track lines.Īround the world Canada
Gantries may be cantilevered or one-sided on the left, right and center (sometimes referred to as a half-gantry or Butterfly gantry), or they may be bridges with poles on each side.
OPEN ROADS SIGNS DRIVERS
Gantries are usually built on high-traffic roads or routes with several lanes, where signs posted on the side of the highway would be hard for drivers to see. They also often contain the apparatus for traffic monitoring systems and cameras, or open road tolling systems. A gantry on the Cherokee Turnpike in Northeast OklahomaĪ gantry (also known as a sign holder, road sign holder, sign structure or road sign structure) is a traffic sign assembly in which signs are mounted or railway signals are supported on an overhead support.
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