Q: Now that the express lanes in Henry County have been open for awhile, what is the timeline for paving the northbound lanes of I-75?

—Carl Roberts, Locust Grove

A: The contractor began the northbound paving preparation activities the week of April 24, according to the Georgia Department of Transportation.

All northbound paving activities will be completed this summer by June 30, GDOT spokeswoman Jill Goldberg told Q&A on the News via email.

The I-75 South Metro Express Lanes opened in January 2017.

The reversible toll lanes run 12 miles along I-75, from Ga. 155 (McDonough Road) in Henry County north to Ga. 138 (Stockbridge Highway) in Clayton County.

Q: What are the Secret Service names for President Donald Trump, First Lady Melania Trump, and their son, Barron Trump?

—Kathy McDonough, Peachtree Corners

A: The president's code name is "Mogul," and the code name for the first lady, a former model, is "Muse," CNN reported. Barron's code name has not yet been reported, although the Secret Service typically uses the same first letter for the codenames of each family member, according to the CNN story.

The U.S. Secret Service cannot confirm or deny code names, a spokeswoman told Q&A on the News.

Fast Copy News Service wrote this column. Do you have a question? We’ll try to get the answer. Call 404-222-2002 or email q&a@ajc.com (include name, phone and city).