iENGINEERING successfully completed the SDR-35 data release and additional application updates for LTPP InfoPave on July 19, 2021. This release contains updates, additions, and changes made to the Pavement Performance Database (PPDB). Maintenance updates were also applied to the LTPP InfoPave website.

The Long-Term Pavement Performance (LTPP) program collects a large amount of pavement performance data that includes inventory, maintenance, monitoring, rehabilitation, materials testing, traffic, and climatic data. This data has been made available by the Federal Highway Administration (FHWA) for pavement engineers, researchers, and other interested agencies. For this purpose, the data is released every year in the form of Oracle database dumps as part of the Standard Data Release (SDR). The SDR is also available in Microsoft Access and SQL Server formats for end-users. The SDR release includes updates to the Pavement Performance Database (PPDB), Ancillary Information Management System (AIMS), Reference Library, and resolution of various data and UI-related queries.

A number of functionality and data enhancements to the existing features have also been implemented. This includes incorporating available MERRA-2 data up to December 31, 2020, and restructuring of LTPP Data Analysis Plan into five new objectives to replace the previous nine objectives. The temperature output for LTPPBind Online has also been reconfigured and updated. In the Tabular Selection of Data Selection and Download feature, classification node-level selection has been implemented to make larger data selections more efficient.