SPEED CALMING USING VERTICAL DEFLECTIONS IN ROAD ALIGNMENT

The Use and Abuse of Vertical Deflections

This paper reviews the deflection of the vertical and its use and abuse in geodetic surveying. ‘Importantly, the deflection of the vertical in Australia will change by around 6” upon the implementation of the Geocentric Datum of Australia (GDA94). Therefore, for some applications, the deflection of the vertical may no longer simply be neglected in survey computations and adjustments. With the r...

OPTIMIZATION OF VERTICAL ALIGNMENT OF HIGHWAYS IN TERMS OF EARTHWORK COST USING COLLIDING BODIES OPTIMIZATION ALGORITHM

One of the most important factors that affects construction costs of highways is the earthwork cost. On the other hand, the earthwork cost strongly depends on the design of vertical alignment or project line. In this study, at first, the problem of vertical alignment optimization was formulated. To this end, station, elevation and vertical curve length in case of each point of vertical intersec...

Determination of Astro-Geodetic Vertical Deflections using Digital Zenith Camera System in Istanbul, Turkey

Of Traffic Calming Devices on Crosstown Road Safety

Use of speed profile as surrogate measure: Effect of traffic calming devices on crosstown road safety performance.

Urban road safety management is usually characterized by the lack of sufficient, good quality crash data and low budgets to obtain it even though many traffic accidents occur there. For example, 54 percent of road crashes in Spain take place in urban areas, and 10 percent of urban fatal crashes occur on crosstown roads, which are rural roads that traverse small communities. Traffic calming meas...