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ERP gantry along the Bukit Timah Expressway.. The Electronic Road Pricing (ERP) system is an electronic toll collection scheme adopted in Singapore to manage traffic by way of road pricing, and as a usage-based taxation mechanism to complement the purchase-based Certificate of Entitlement system.
Electronic road pricing (ERP, Chinese: 電子道路收費系統) is an electronic toll collection scheme first proposed in Hong Kong as early as in the 1980s to manage traffic by congestion pricing. ( Singapore , which first adopted ERP in 1998, was the first city in the world to implement electronic congestion pricing.
The gantries over the M42 motorway in the United Kingdom show the variable speed limit in operation. Active traffic management (also managed lanes , smart lanes , managed/smart motorways ) is a method of increasing peak capacity and smoothing traffic flows on busy major highways .
An active suspension is a type of automotive suspension that uses an onboard control system to control the vertical movement of the vehicle's wheels and axles relative to the chassis or vehicle frame, rather than the conventional passive suspension that relies solely on large springs to maintain static support and dampen the vertical wheel movements caused by the road surface.
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. Similar gantries are used in railway signalling or to suspend overhead lines on multi-track lines .
To counteract this, rollover stability systems have begun to incorporate an active suspension system in rollover protection. To accomplish this, the onboard computer uses data from the inertial measurement unit (IMU) to determine when a vehicle is in a rollover condition independent of yaw rate and vehicle speed. When the computer determines ...