New London — Eversource Energy on Thursday announced plans to invest more than $1.4 million in New London's natural gas system starting next week.

The project includes replacing more than 3,200 feet of cast iron and steel gas mains with safer plastic piping that Eversource says is more durable and better equipped to handle underground temperature swings.

Eversource said crews would work 7 a.m. to 4 p.m. Monday through Friday, with construction planned along Montauk, Ocean and Blydenburg avenues, Linden and Orchard Streets, and Alger Place. Eversource expects the gas line improvements to be completed by mid-April.

Eversource said it has replaced about 140 miles of aging gas lines across Connecticut since 2012.

Drivers may experience delays due to alternating one-way traffic. Some customers may experience a short disruption to their natural gas service when the new line is being activated; Eversource will notify such customers in advance by letter, phone or in-person.

For more information, visit Eversource.com.