Type II barriers have two reflective rails with orange and white stripes that alternate. Because the bottom half of the barrier is also reflective, these are often more visible at night than Type I Barricades. However, they do provide some extra safety for drivers at night because they force them to slow down before passing through a barricade.
Type III barriers have three reflective rails with alternating black and white stripes. They are similar to Type II Barriers in design but with less conspicuous colors. These barriers are recommended for high-volume roads where it is difficult to see traffic signals or other visual alerts. They are also used in industrial areas where there may not be much activity after hours.
Type IV barriers are made of metal and have four reflective strips of equal length. They are most commonly found at airports but are used in other hazardous locations such as roundhouses, engine houses, and train yards. These barriers can be closed off the end opposite from traffic so that drivers have no choice but to stop before going through.
Type V barriers are made of wood and have five vertical posts with horizontal bars between them. These barriers are usually placed in parking lots to block vehicles from entering a restricted area. They are useful when you want to prevent people from driving around a corner site inspection without getting out of their cars.
Type III Barricades include three reflecting panels and are bigger than Type 2 or Type 1. Because of their increased size and visibility, type 3 barriers are most commonly employed for road closures. They are placed across highways to provide diversions, road closures, and other forms of traffic management.
Type 3 barriers can be moved along railway lines or removed from roads to allow train passage. They may also be used as permanent speed restrictions to create rail crossings or change lanes. Their large size makes them visible from far away, so they are best placed on major routes with high levels of traffic.
Type 3 barriers can either be fully mechanical or electronic. Electronic type 3 barriers use radio frequency identification (RFID) technology to detect vehicles. These barriers can only be opened from the non-barrier side using a special reader device carried by security officers or maintenance workers. Mechanical type 3 barriers are operated by swinging arms or trolleys that block vehicle access when they reach the closed position.
Barriers of all types must be maintained to ensure their effectiveness. Maintenance includes cleaning debris off of barrier surfaces, replacing malfunctioning parts, and repairing damage caused by accidents or vandalism.
Type 3 barriers can cause problems for drivers in multiple ways. By blocking the highway, they can cause delays if there is no alternative route around the closure.
Barricades are classified into three types: Type I, Type II, and Type III. They are frequently utilized for road closures and diversions where automobiles are present. However, each type of barrier has different characteristics and was intended for a certain purpose.
Type I barriers are the most common and include wooden planks, plastic pipes, metal cages, and concrete blocks. These barriers can be used as temporary seating or to form a pedestrian tunnel. Type I barriers should be at least 1.2 meters (4 feet) high with the top surface no less than 30 centimeters (1 foot) above ground level. The barrier should be placed in such a way that it does not obstruct any driving view.
Type II barriers are similar to Type I barriers but they are usually higher and often contain stairs or ramps for access by disabled people. Type II barriers are generally used instead of Type I barriers if there is danger from speeding vehicles or if there is likely to be large number of pedestrians. For example, if a parade is expected to pass through a section of road then a Type II barrier would be used instead of a Type I barrier because people have more time to move out of the way.
Type III barriers are similar to Type I barriers but they are usually much taller and incorporate guard rails and lighting. This type of barrier is used when there is a risk of serious injury from automobile collisions.