Investors focused on the Transportation space have likely heard of ArcBest (ARCB), but is the stock performing well in comparison to the rest of its sector peers? One simple way to answer this question is to take a look at the year-to-date performance of ARCB and the rest of the Transportation group's stocks.ArcBest is one of 144 companies in the Transportation group. The Transportation group currently sits at #4 within the Zacks Sector Rank. The Zacks Sector Rank considers 16 different groups, measuring the average Zacks Rank of the individual stocks within the sector to gauge the strength of each group.The Zacks Rank is a proven system that emphasizes earnings estimates and estimate revisions, highlighting a variety of stocks that are displaying the right characteristics to beat the market over the next one to three months. ARCB is currently sporting a Zacks Rank of #1 (Strong Buy).Over the past 90 days, the Zacks Consensus Estimate for ARCB's full-year earnings has moved 28.26% higher. This is a sign of improving analyst sentiment and a positive earnings outlook trend.According to our latest data, ARCB has moved about 28.81% on a year-to-date basis. At the same time, Transportation stocks have lost an average of 3.72%. This means that ArcBest is outperforming the sector as a whole this year.Breaking things down more, ARCB is a member of the Transportation - Truck industry, which includes 17 individual companies and currently sits at #14 in the Zacks Industry Rank. This group has gained an average of 4.67% so far this year, so ARCB is performing better in this area.Investors in the Transportation sector will want to keep a close eye on ARCB as it attempts to continue its solid performance.Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report ArcBest Corporation (ARCB): Free Stock Analysis Report To read this article on Zacks.com click here.