Conventional surveying services were utilized to develop the primary and secondary survey control networks. Conventional surveying operations also included setting and locating nearly 300 LiDAR targets throughout the project limits into the survey control network. Project plans were developed, reviewed, and approved by LIRR and then converted into Site-Specific Work Plans (SSWP) for both the conventional surveying and on-track hi-railing operations. Prior to field operations all field personnel completed and passed Roadway Working Training to be able to work in all the track areas of the project.

The hi-rail LiDAR operations were scheduled for 14 days but were completed in only 9 days and had zero disruption to revenue trains. LIRR provided +/-4 hours of track time per day. Hi-rail operations started immediately after the morning “rush hour” and concluded prior to the start of the afternoon “rush hour”. In total there were 35 miles of track and 3 storage yards collected.

LIRR – Jamaica Station Ph II, Queens, NY

LocationQueens, NY

ProjectJamaica Station

CategoryRail LiDAR

The overall goal of the Jamaica Capacity Improvements is to modernize critical infrastructure in and around Jamaica Station. To support that initiative, SSI was selected to provide surveying services including Mobile LiDAR collection. The project limits included all the station tracks from the Kew Gardens Station to the Hollis Avenue station including all shop tracks and storage yard tracks, the Atlantic Branch line connections, and Montauk Branch line connections.

The SSI Solution

Mobile LiDAR was utilized in the project to capture all visible features to develop the existing track alignments and to create the planimetric base mapping for the project. Conventional surveying services were utilized to develop the primary and secondary survey control networks.