L.A.'s plan to implement a voter-approved measure requiring the city to make mobility and safety upgrades when doing routine maintenance work on certain streets went into effect Monday.

The plan includes an appeals process. So if you’re a Los Angeles resident and think the city didn’t install Measure HLA-mandated upgrades where it should have, you can now make your case to local officials. Here’s the context you need to know and instructions on how to file an appeal.