Time Warner Cable said on Tuesday it is investing more than $5 million this year to expand its high-speed broadband network in dozens of communities across Maine.

By the end of the year, more than 3,000 additional homes and businesses will have access to the Time Warner Cable’s fiber-optic network. The move is part of a larger, $100 million investment the company is making in markets throughout New England, New York and the Carolinas as customers demand faster Internet speeds, the company said.

The project includes new broadband service for towns such as Hiram, Porter, Orland and Ellsworth, as well as completion of a downtown Bangor fiber-optic network connecting over 350 buildings, and extended fiber network to more than 650 commercial buildings in Portland, the company said.

In all, Time Warner Cable will add more than 150 miles to its 12,000-mile network of high-speed cable in Maine this year. Time Warner Cable is the largest cable operator in Maine, serving more than 360,000 customers with video, Internet and phone services.

“This investment by Time Warner Cable will directly help our job creators gain access to one of the most critical tools needed to expand, compete and create new jobs in Maine,” George Gervais, commissioner of the Maine Department of Economic and Community Development, said in a statement.