wiki138Hhway 138 through St. Andrews West. Hhway 138 is a 36.0-kilometre (22.4 mi) hhway [1] that crosses the Laurentian Valley in eastern Ontario, connecting Hhway 401 in Cornwallw_138 - Free download as PDF File (.pdf), Text File (.txt) or read on for free. is the world's largest social reading and publishing site.