Most of the nation’s largest seaports are reporting record cargo volume amid stalled trade negotiations between the United States and China.

Pier 400 in Los Angeles is North America’s largest shipping terminal. More than 1,700 trucks pass through on average per day, even in the middle of the U.S.-China trade war.

Officials with the ports of Los Angeles and Long Beach, Calif., have approved measures that are designed to reduce air pollution from new trucks just entering drayage service, specifically those that go in and out of the marine terminals.

The Port of Long Beach had its best first quarter, up 19.4% compared with the same period in 2017.

In another sign that the U.S. economy is doing well, officials at the Port of Los Angeles and the nearby Port of Long Beach, Calif., said February was a record month for shipping goods in and out of the biggest ports in the United States.

The average time to enter and exit the two largest containerports in the United States slowed one minute in January on a year-over-year basis, although the percentage of trips over two hours fell in the same period.

Truck drivers took one minute longer, on average, to enter and exit the two large ports in Southern California in December 2017 compared with the same month in 2016, although the full-year average was three minutes faster than a year ago.

A coalition of the top three containerports, two private terminal operators and two industry analysts wrote a letter to President Donald Trump and Congress to urge lawmakers not to forget the ocean freight industry during the debate on infrastructure.

The average time it took a truck driver to enter and exit the two largest ports in North America — Los Angeles and Long Beach — was 10 minutes quicker in November versus the same time a year ago, according to the Harbor Trucking Association.

The sound — and smell — of thousands of idling trucks at the ports of Los Angeles and Long Beach could be fading if a new pilot project to convert them to part-time electric vehicles sticks.