As freight demand increases this year, truckload carriers are considering adding capacity. A quarter of carriers surveyed expected to increase their capacity by 6 to 10 percent this coming year. Higher rates are making some carriers confident about adding capacity in 2012. However, some analysts are predicting tightened truck capacity and an upward trend on rates for North American shippers as freight demand out performs GDP. With capacity tight, the carriers can keep rates elevated and bolster their bottom line. Supporting this argument, 65 percent of trucking executives surveyed said they plan to add little to no capacity, down 8 percent from November 2011.