Search results
Results from the WOW.Com Content Network
The pavement condition index (PCI) is a numerical index between 0 and 100, which is used to indicate the general condition of a pavement section.The PCI is widely used in transportation civil engineering [1] and asset management, and many municipalities use it to measure the performance of their road infrastructure and their levels of service. [2]
The international roughness index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles. It is calculated using a quarter-car vehicle math model, whose response is accumulated to yield a roughness index with units of slope (in/mi, m/km, etc.). [1][2] Although a universal term, IRI is calculated per ...
Ramp travel index. Ramp travel index or RTI, is a way of measuring a vehicle's ability to flex its suspension, a property also known as axle articulation. The RTI rating is used mainly in the off-roading industry to test and describe chassis limits of modified vehicles. The ramps vary between 15 and 30 degrees of angle for the vehicle to ride up.
Up to and including 1939, every road written into law by the legislature was given a number by the SRD. This included the range from SR 397 to SR 449, which included most of the 1926 Bond Issue Roads in Orange County and some other major roads. The 1939 numbering ended with SR 545; 546 to 549 were skipped.
Fourth power law. The fourth power law (also known as the fourth power rule) states that the greater the axle load of a vehicle, the stress on the road caused by the motor vehicle increases in proportion to the fourth power of the axle load. This law was discovered in the course of a series of scientific experiments in the United States in the ...
An aerial view of the road. Florida State Road 869 (SR 869) is a 24-mile-long (39 km) state road located in western and northern Broward County, acting as a de facto bypass of Fort Lauderdale as well as the northern coastal and southern parts of the county extending north from a junction of I-75 (), I-595 in Sunrise to Coral Springs where it heads eastward towards Florida's Turnpike and ...
The PSI was developed based on the AASHO Road Test's present serviceability rating (PSR). AASHO Road Test was a set of experiments carried out by the AASHTO from 1956 to 1961. [4] Unlike the PSR, which was a ride quality rating that required a panel of observers to ride in a car over the pavement of interest, the PSI does not require a panel of ...
Falling weight deflectometer. A falling weight deflectometer (FWD) is a testing device used by civil engineers to evaluate the physical properties of pavement in highways, local roads, airport pavements, harbor areas, railway tracks and elsewhere. The data acquired from FWDs is primarily used to estimate pavement structural capacity, to ...