Virginia Transportation 16 PDH Discount Package 1

This online engineering PDH course refers to military design requirements and objectives and provides guidance on the general provisions and geometric design criteria for the design of roads, streets, bridges, walks, parking, residence drives and storage areas. It discusses how geometric design deals with the dimensions of the visible features of a facility such as alignment, sight distances, widths, slopes, and grades.

This 3 PDH online course is applicable to civil and traffic engineers, technical professionals and construction personnel who are interested in gaining a better understanding of geometric design for roadways, walkways and open storage areas.

This online engineering PDH course presents a study that addresses various aspects of geosynthetic durability to develop procedures that could be used to predict long-term strength losses of geosynthetics used in highway applications. These procedures are essential to designers for allowing tensile capacity for geosynthetics used primarily in mechanically stabilized earth (MSE) retaining walls, reinforced soil slopes, and foundation stabilization.

This study was initiated to allow voiced concerns that stress-cracking potential was not being considered in developing the allowable tension load capacity for design when using high-density polyethylene (HDPE) geogrids. Stress cracking is a potential mode of failure occurring in thermoplastic materials that are under a sustained stress significantly lower than the material’s room temperature yield strength, resulting in quasi-brittle fracture of the material. This is also known as slow crack growth and environmental stress cracking (ESC) when in contact with certain aqueous solutions.

This 1 PDH online course is applicable to all civil engineers, highway design professionals, transportation planners, material manufacturers and all personnel interested in learning about geosynthetics for highway applications.

This online engineering PDH course presents the fundamental design principles common among all roundabout types. This course also presents detailed design considerations specific to multilane roundabouts, rural roundabouts, and mini-roundabouts.

Designing the geometry of a roundabout involves choosing between trade-offs of safety and capacity. Roundabouts operate most safely when their geometry forces traffic to enter and circulate at slow speeds. Horizontal curvature and narrow pavement widths are used to produce this reduced-speed environment. Conversely, the capacity of roundabouts is negatively affected by these low-speed design elements. As the widths and radii of entry and circulatory roadways are reduced, the capacity of the roundabout is also reduced.

Furthermore, many of the geometric parameters are governed by the maneuvering requirements of the largest vehicles expected to travel through the intersection. Thus, designing a roundabout is a process of determining the optimal balance between safety provisions, operational performance, and large vehicle accommodation.

This 4 PDH online course is applicable to traffic engineers, transportation planners, managers, and other technical professionals who are involved in the geometric design of roundabouts.

This online engineering PDH course presents the factors that lead up to the decision to construct a roundabout with an approximate configuration at a specific location, preceding the detailed analysis and design of a roundabout. By confirming that there is good reason to believe that roundabout construction is feasible and that a roundabout offers a sensible method of accommodating the traffic demand, these planning activities make unnecessary the expenditure of effort required subsequently.

This course also presents methods for analyzing the operation of an existing or planned roundabout. These methods allow a transportation analyst to assess the operational performance of a facility, given information about the usage of the facility and its geometric design elements. An operational analysis produces two kinds of estimates: (1) the capacity of a facility, i.e., the ability of the facility to accommodate various streams of users, and (2) the level of performance, often measured in terms of one or more measures of effectiveness, such as delay and queues.

This 5 PDH online course is applicable to traffic engineers, transportation planners, conceptual and detailed designers, and other technical professionals who are involved in the planning and operation of roundabouts.

This online engineering PDH course presents guidelines on the design of traffic elements, illumination, and landscaping associated with roundabouts.

The design of these elements is critical in achieving the desired operational and safety features of a roundabout, as well as the desired visibility and aesthetics.

This 3 PDH online course is applicable to traffic engineers, transportation planners, conceptual and detailed designers, and other technical professionals who are involved in the traffic design and landscaping of roundabouts.