As the economy continues to improve, forecasters have had to re-evaluate their predictions for car sales several times, and according to Kelley Blue Book, they might have to do it again. The new and used car information provider expects that car sales in March will reach their highest levels since 2007.

Analysts expect there will be around 1.425 million units sold in March,  bringing the year-long prediction to about 14.6 million. That sales estimate is the highest for any March over the last five years, since the levels reached about 1.5 million in 2007. There are a number of reasons for the impressive sales, but analysts believe it's largely due to the fact that there's an increased demand for fuel-efficient vehicles along with the release of a redesigned Toyota Camry.

"Conditions in the economy have generally been positive through the first few months of the year, and if conditions remain steady, the industry can expect to see continued strength in sales for the months ahead," said Alec Gutierrez, senior market analyst of automotive insights for Kelley Blue Book. "Rising fuel prices could slow down the current momentum in sales growth if left unchecked, so this will be a key factor to monitor moving forward."

The number of people buying or considering purchasing a fuel-efficient car has also been on the rise. A recent study from kbb.com found that 51 percent of respondents said they want a smaller car with higher gas mileage. Furthermore about 20 percent of people are weighing the option of buying a hybrid, alternative fuel or diesel-powered vehicle.

With more people buying new cars, there may also be more used options for people looking for an affordable ride, and New Jersey State Auto Auction has a wide variety of used vehicles to choose from.