The line will provide service from Dallas's northeast suburbs of Plano, Richardson, and Addison to Dallas/Fort Worth International Airport Terminal B.

[11] On February 12, 2019, the DART board approved construction of a second track along the entire length of the line, which is anticipated to reduce wait times between commuter trains, avert delays during construction and maintenance, and better accommodate freight trains using the line.

[12] Construction commenced in 2019 after DART secured a $908 million Railroad Rehabilitation and Improvement Financing federal loan from November 2018 to pay for most of the projected $1.1 billion cost.

To allow for flexibility of assignments with a small overall staff, engineers and conductors will be cross-trained, certified, and qualified in both areas.

The short line operations are limited to periods of non-peak passenger movements, but the Class I railroads are independently dispatched.

There are 10 under construction stations including:[4] Eight Stadler FLIRT (Fast Light Intercity and Regional Train) diesel multiple unit (DMU) trainsets were ordered in June 2019 to operate on the Silver Line.

This will make DART the fourth transit agency in Texas to use Stadler Rail DMUs, after orders for the Denton County Transportation Authority A-train, Capital MetroRail in Austin, and TEXRail.

[22][23] It is the third system in the United States to use FLIRT DMUs, TEXRail being the first, and the Arrow in San Bernardino County, California, being the second.

The Environmental Impact Statement released in 2018 suggests that trains may eventually run along the TEXRail corridor to Fort Worth.

The North Central Texas Council of Governments (NCTCOG) in a 2022 meeting discussed the possibility of rail expansion beyond the current northern terminus Parker Road Station from Plano through Allen to McKinney.