: Help

The LTPPBind Online User guide (HRT-17-010) is available in the Library section of InfoPave. Use Adobe Reader to read Portable Document Format (PDF) files.

No. LTPPBind comes in two versions, the on-line tool on LTPP InfoPave which is the most current and LTPPBind 3.1 which it replaced. LTPPBind 3.1 is available for download from the InfoPave site from the same Tools location as the on-line version.

Base HT PG is the high-temperature PG before applying any traffic or depth adjustment. The base HT PG is used only to estimate the traffic adjustment or “bumping grade.” Base HT PG can be assumed from local experience or design guides among the four options available (52, 58, 64 and 70). After running the LTPPBind, the assumed value can be compared with the “Performance Grade Temperature at 50% Reliability” in the Performance Grade Table of LTPPBind. The initial assumption needs to be changed only in the case that the difference between those values is one or more PG grades. This option gives the opportunity to see how the PG HT is impacted by the traffic adjustment.

LTPPBind Online does not compute 95% reliability, just 50% and 98%.

Under Tools see Use LTPP Data as MEPDG Inputs for Local Calibration. This feature currently provides the input for all JPCP sections (SPS-2 and GPS-3). The option to provide input for all sections will be considered in the next phase of LTPP InfoPave.

The on-line version is located under Tools. The spreadsheets are linked under the About button for the on-line tool.