Measure 3.h – summary description of quality indicators identified by the grantor.

The service quality indicators, defined by the Grantor are as follows:

• the Ipav Pavement Structural Condition Indicator, which takes into account the Surface Roughness (Ia1) and Regularity (Ia2) of pavements as representative of the road’s superstructure, related to technical safety and travel comfort. Both indicators are measured on the travel lane, typically characterized greater wear and degradation, with high performance machine: the Surface Roughness Indicator Ia1 measures the Coefficient of Transverse Adhesion (CAT) while the Surface Regularity Indicator Ia2 measures the International Roughness index (IRI). Measurements related to the calculation of the indicators for each calendar year are made within the first half of the year and the values are determined by weighted average with different weights according to the classes of values. For the determination of the annual Ipav Structural Status Indicator both said indicators are added together with weights of 0.6 for Ia1 and 0.4 for Ia2, respectively.
  Ipav 2025 = 61.00
• the Accident Indicator Is, which measures the overall results of the state of the infrastructure and its management, is based on the Overall Accident Rate (G.I.R.), which in an evolved road situation, with modern vehicles and average users experienced in the use of fast infrastructure, depends to a good extent on the state of the road. The T.I.G. measures the number of total accidents occurring on the freeway site, excluding appurtenances, recorded by the Traffic Police related to 100 million km traveled on homogeneous stretches of freeway of different morphology where, in the case of SdP, both the A24 and A25 freeways are classified by the Grantor as “mountain” freeways. For each calendar year, the annual Is accident indicator is calculated on the basis of the TIG values recorded in the second half of the previous year and the first half of the calendar year by means of a weighted average with different weights according to different TIG classes.
  Is 2025 = 100.00 (maximum value)

GENERAL INFORMATION ON USE AND MANAGEMENT OF INFRASTRUCTURE AND SERVICES