The company that operates Denver International Airport's parking shuttles is eliminating 35 drivers, which could lead to reduced service at certain times.

Ampco System Parking announced the layoffs to its employees this month and is working with the airport to adjust its bus routes and schedules.

DIA spokesman Jeff Green said the move could involve some service tweaks between the main terminal and the economy, Pikes Peak and Mount Elbert parking lots. Most passengers, though, won't notice a change.

"Any reduction in hours is going to come at times of the day and days of week when the lots aren't as busy and the demand is not as great," Green said.

It might not even come to that. DIA is exploring options that would keep passenger bus service at current levels, where wait times average about 10 minutes.

"Quite frankly, we're looking at ways where we can keep the passenger schedule as it is," Green said, declining to offer up specifics. "We're working with Ampco to see if there are alternatives or even anything that can be done to increase the average number of daily bus hours."

The airport doesn't expect much of an impact on the employee lots, either.

Starting next week, buses for certain types of DIA workers will stop at just one concourse - rather than all three - from the slow midnight to 4 a.m. period. Employees then will have to ride the airport train to the other concourses.

Officials from Ampco, which Green said employs more than 200 at the airport, did not return messages left by the Rocky.

The move comes two years after DIA worked with Ampco to enhance shuttle service amid record passenger numbers and complaints about crowded shuttles and long waits. The airport added six passenger buses to the busy Pikes Peak parking area and split the lot to route passengers to their cars more easily.