WASHINGTON — The Texas Department of Transportation, long viewed as hyperpartisan and arrogant by some members of the state's congressional delegation, has been trying to soften its image by reaching out to lawmakers of both parties in the nation's capital. But while state transportation officials are having some success in easing the personal animus, they still face a stiff challenge in selling their policy agenda to the state's elected officials in Washington. Many Texans on the Potomac cringe at the agency's embrace of toll roads, the controversies surrounding the Trans-Texas Corridor and TxDOT's resistance to many of the highway earmarks...