The phrase "a second track of" is correct and usable in written English.
It can be used when referring to an additional or alternative path, method, or approach in a discussion or analysis.
Example: "In our project, we decided to pursue a second track of research to explore different outcomes."
Alternatives: "an alternative path of" or "a different avenue of".
Speaking on the very stage occupied the night before by Mr. Mottaki, President Obama's national security adviser, Gen. James L. Jones, said that Iran's "puzzling defiance" compelled "all of us to work together as allies and partners on a second track of increased pressure".
While Alexa and the Amazon Echo hub are fast becoming household names, there is a second track of AI development at Amazon, at the AWS enterprise level.
These days, the rise of tech and an increasing prevalence of the contractor model has brought in a second track of competition — from Silicon Valley.
While automakers and startups continue to hone the technology for self-driving cars for individuals, a second track of development in the area of autonomous buses is also taking shape.
In 2002, during construction of the Montclair Connection, the tower was demolished in favor of expanding the cut in Roseville for a second track of the new Montclair-Boonton Line. Montclair-Boonton Line
For example, this year, the Polsky Center added a fifth track of its nationally-ranked Edward L. Kaplan, '71, New Venture Challenge accelerator program that is dedicated to helping all University of Chicago alumni around the globe get support for their startup ventures.
She offered a second track, "Think of Me" from The Phantom of the Opera, for download in July 2014.
The 26-year-old clocked a second track record of the competition in her final run at Winterberg to beat German Jacqueline Loelling by 0.67 seconds, with Canada's Elisabeth Vathje third.
On Viva la Vida or Death and All His Friends, "Lovers in Japan" transitions seamlessly into a second track entitled "Reign of Love".
Work on a second track has not begun as of 2014, but is the in the budget for the double track between Hell and Værnes.
On a second track, China works to bar organizations of Chinese or Tibetan exiles from getting a hearing there.
