Soon under the YellowaY name Townsend ran his coaches across Nebraska between Chicago (in Illinois) and Denver (in Colorado) – and maybe onward to Salt Lake City (in Utah).
In 1928 Townsend sold some (but not all) of his rights (in the routes of the Cornhusker Stage Lines) to the newly formed American Motor Transportation Company, which bought also most of the other independent YellowaY member firms, and which then operated them as the YellowaY-Pioneer System.
[On 11 September 1928 a YellowaY-Pioneer coach completed the first regularly scheduled coast-to-coast bus trip in the US (from Los Angeles to New York City) by a single operating company.]
Meanwhile, even before Townsend sold the remainder of Cornhusker to Interstate (that is, not later than 1929), he began another carrier – the Atlantic-Pacific Stages, running between Saint Louis (in Missouri) and Los Angeles (in California) via Kansas City (on the state line between Kansas and Missouri), Denver (in Colorado), and Albuquerque (in New Mexico) – which in 1930 he sold to the Interstate Transit, Inc., a completely different firm (different from the Interstate Transit Lines) with a confusingly similar name, operating as the Colonial Stages, which afterward became renamed as the Colonial Atlantic-Pacific Stages (called also CAPS), and which succumbed in 1932 during (and as a casualty of) the Great Depression.
After the second (and final) failure of the CAPS, Townsend moved to New Orleans (lawfully taking with him about 20 of the newer coaches, Macks of the model BK), bought a controlling interest in the Teche Lines, and began making deals with The Greyhound Corporation.
By 1954 the TGL ran from New Orleans to Baton Rouge (in Louisiana), Natchez (in Mississippi), through Hammond (in Louisiana) to Jackson (in Mississippi and on the way to Memphis, Saint Louis, and Chicago), through Hattiesburg and Meridian (both in Mississippi) to Birmingham (in Alabama), through Mobile and Montgomery (both in Alabama) and Columbus (in Georgia) to Atlanta (in Georgia), through Mobile to Marianna (in Florida and on the way to Tallahassee and the rest of the Sunshine State), and westward through Lafayette to Lake Charles (both in Louisiana and on the way to Houston, the rest of Texas, and the rest of the West), plus along several regional and feeder routes in the southern part of the Pelican State.
The TGL took part in major interlined through-routes (using pooled equipment in cooperation with other Greyhound companies) – that is, the use of through-coaches on through-routes running through the territories of two or more Greyhound regional operating companies – connecting New Orleans with Los Angeles, Houston, Memphis, Saint Louis, Chicago, Detroit, New York City, Washington, Jacksonville, Miami, and Saint Petersburg.
In October 1954 The Greyhound Corporation merged Teche and a neighboring operating company, the Dixie GL (called also Dixie or DGL), based in Memphis, Tennessee, into the Southeastern GL (called also Southeastern, SEG, SEGL, or the SEG Lines), another neighboring regional company, based in Lexington, Kentucky.
After that merger the newly expanded Southeastern GL served 12 states along 13,227 route-miles of highways – from Cincinnati (in Ohio), Saint Louis, Memphis, Natchez, Baton Rouge, New Orleans, and Lake Charles – to Savannah and Jacksonville – from the Mississippi River to the Atlantic Ocean and from the Ohio River to the Gulf of Mexico.