APAC 20 | APAC 31 | APAC 40 | APAC 44 | APAC 50 | APAC 51 | APAC 60 | APAC 65 | APAC 70 | APAC ENCapSealâ¢ | APAC V-Blockâ¢. APAC 20 is a concentrated acrylic primer used before installing self-leveling underlayments or topping materials on porous floor substrates.
In cases where a ramp terminal involves a surface street junction, the. procedures for signalized or unsignalized intersections must be used to assess the complete. performance of the ramp. The ramp junction methodology estimates the performance of the. ramp-freeway junction.
Diverging Diamond Interchanges What is a Diverging Diamond Interchange? The diverging diamond interchange (DDI) is an alternative interchange design that is becoming more widely used across the Commonwealth and other States. The primary feature of a DDI is that the opposing traffic streams on one of the crossing roads is reversed for a short section through the interchange area.