A lot of Americans will be on the road this weekend enjoying a long Labor Day holiday. Driving in the car usually means listening to the radio, at least part of the time. Here's a graphic created by RadioTime, Inc. to show "...how significantly the car radio has evolved from its origins during the Great Depression. See a larger version. (Graphic: RadioTime, Inc.)

SIRIUS XM Radio is offering special programming for Labor Day weekend. The Martha Stewart Living Radio "Annual Labor Day Pet Marathon" will air September 6 beginning at 7:00 a.m. ET. It will highlight advice, guidance, and answers to pet care questions through various experts. (SIRIUS channel 112 and XM channel 157)

Doctor Radio will offer a 24-hour "Back to School" marathon hosted by pediatrician, Perri Klass, MD. She "...will dispense her knowledge on all aspects of beginning the school year from back to school medical exams to making new friends, [and] separation anxieties, " according to a news release. Klass will be joined by many other medical professionals. The marathon begins 12:00 a.m. ET September 6. (SIRIUS channel 114/XM channel 119)

In honor of Labor Day, Freewheelin' with Meredith Ochs and Chris T., a daily talk show, is talking up items "Made in the USA" all week including "...vehicles, fuel, clothing, musical instruments, hardware, home furnishings, even food," says SIRIUS XM. (SIRIUS channel 147 and XM channel 171)

This past Saturday radio host, Steve Harvey, emceed the 7th Annual Ford Hoodie Awards which honor local businesses, educators and leaders across the country for their contributions in service in their communities. This year's Hoodies were held at the Mandalay Bay Resort and Casino in Las Vegas to honor the award recipients. Some categories included: "Best Community Leader", "Best Soul Food", "Best High School", "Best Fried Chicken", "Best Church Choir", and more.

See Video: Harvey has videos posted at his website of the individual award winners.

More About Harvey: Morning Radio Host Steve Harvey: On Top of the Hill, Not Over It

Tampa Bay's FM dial lost a Smooth Jazz radio station today and gained a a new Hit Music one. At 3 p.m. this afternoon WSJT-FM flipped format to "Play 98.7." According to a news release the station "will broadcast 'today's best hits, without the rap' and feature popular music from artists such as Katy Perry, Kings of Leon, Train, John Mayer, Maroon 5, and Rob Thomas, among others." (Graphic: WSJT/Tampa)

Play 98.7 is also streaming online at www.play987.com and is available on various mobile devices. The station is being programmed by Orlando Davis, the Program Director and morning host for WiLD 94.1 (WLLD-FM). Play 98.7 is owned by CBS Radio which operates 130 radio stations across the United States.

For those fans of WSJT's former format, Smooth Jazz, they can still find that programming but it will live at the station's secondary HD frequency, WSJT 98.7 HD2 and online at www.wsjt.com.

More: Why Did My Favorite Radio Station Change Format?