After more than 15 years of writing and recording, Alison Krauss has tied together the diverse corners of her career with Lonely Runs Both Ways. Propelled by Krauss’ fiddle playing — still razor sharp after all these years —“Rain Please Go Away,” “Unionhouse Branch,” and “This Sad Song” hearken back to Union Station’s early days as hardcore bluegrass rabble rousers. In addition, “Goodbye Is All We Have,” “Crazy As Me,” and “Doesn’t Have to Be This Way” offer that singular mix of wounded emotion and purity that Krauss perfected throughout her 20s. Then there are the hummable pop songs that continue along the path of 2001’s wildly successful New Favorite: “Restless” and “Wouldn’t Be So Bad.” Different fans gravitate towards different sides of Krauss’ art, but each holds equal space in her heart. As both a primer for newcomers and a compendium for longtime followers, Lonely Runs Both Ways is the most well-rounded entry in the catalog of an artist who refuses to stop evolving.