As transportation advanced along railroads and highways, Marietta was initially passed by. From 1868 to 1870, the B & O Railroad built a bridge to connect Parkersburg, West Virginia and Belpre; and the National Road went further north through Zanesville.
as TraNspOrtAtiOn advanCeD ALong railroadS anD HigHwAYS, MarietTa wAs inITIAlLy pasSed by. from 1868 To 1870, the B & o raiLroad builT a brIdge To ConNeCt pArKerSBurG, WeST VirginIa And BElpre; ANd the natiOnal rOaD wENt furtheR NOrth ThroUgh zAneSvIllE.