If you’ve ever parked on the street where you live, odds are you’ve forgotten to move your car on the weekly street sweeping day.

Last year, the D.C. Department of Public Works wrote more than 86,000 tickets for just that. It’s a $45 fine, but department officials say they want to keep the streets clean—not make money.

“We don’t want to ticket cars… right? We don’t want to tow cars,” says interim DPW director Christopher Geldart. “If we can have folks have a better way to understand ‘hey the street sweeper is coming’ gotta move your car, that helps all of us.”

To that end, the department has released a new app, called D.C. MyDPW, to send reminder push alerts to drivers who park on the streets. It’s available on iPhone and Android.

The app is designed for residents who frequently park on residential streets, allowing them to receive alerts about the specific blocks they select.

District street sweepers removed more than 4,300 tons of litter from streets last year.

If you don’t move your car, parked vehicles may be towed so sweepers can clean the curb lane. Generally, parking is prohibited from either 9:30 to 11:30 a.m. or 12:30 to 2:30 p.m. while sweeping is underway on designated days.

The app sends alerts for leaf collection days and notifications if your vehicle has been booted or towed. DPW hopes to add new features in the future.

You might want to download it soon.

Street sweeping starts Monday, March 4.

WAMU has previously reported that there are about 15 street sweepers roaming city streets day and night—during sweeping season. About 30 city workers are assigned to the task.

William Houston, a sweeper operator for the past 16 years, says the hardest part of the job is cars parked in the way of his sweeper. “We have a lot of people who just say they don’t want to move their cars.”

This story originally appeared on WAMU.