It's part of Metrolink's biggest restoration plan since the pandemic began.
The service update will also make four Amtrak trains available to all Metrolink ticket holders and will add weekend service on the Ventura County Line.
Metrolink CEO Darren Kettle said he is "elated that we're able to restore our service close to pre-pandemic levels, so our riders can get to work, to friends and family and to fun -- more affordably and without the headaches of traffic and parking.''
Metrolink says skyrocketing gas prices will likely be an incentive for more people to climb aboard commuter trains.
READ MORE: Will Angelenos turn to public transit amid high gas prices?
"Metrolink is the backbone of public transportation in Southern California as it literally links people from their homes to their workplaces and other destinations -- from the Inland Empire to Oceanside or Ventura, throughout the Antelope, San Fernando and Perris valleys and into Los Angeles,'' Metrolink Board Chair Ara Najarian said in a statement. "With soaring gas prices and excessive traffic congestion, it was important that we bring back more service now as people are returning to the office and traveling for leisure and more.''
In March 2020, Metrolink slashed its schedule by about 30%, responding to a 90% drop in ridership as the COVID virus took hold and stay-at-home orders took effect. But with more workers returning to their workplaces, and with gas prices at record highs, the regional commuter service has seen sharp ridership growth on weekdays and weekends, according to the agency.
The upgrades being made next month are:
- 91/Perris Valley Line: Two added trains with midday service to Los Angeles and a reverse morning trip to Riverside County
- Antelope Valley Line: Six added trains and schedule updates offering increased flexibility for weekday travel
- Orange County Line: Two added trains offering more weekday morning service
- Riverside Line: Four added trains offering increased flexibility for weekday travel
- San Bernardino Line: Six added trains including later evening trains, plus new Sunday service
- Ventura County Line: Six added Metrolink trains including weekday morning and evening trains, plus four Amtrak Pacific Surfliner trains that are now available to all Metrolink ticket holders -- including on Saturday and Sundays.
City News Service contributed to this report.