The Philadelphia DUI Law Blog

Pennsylvania's Ignition Interlock Law

If you are arrested for a drunken driving offense in Pennsylvania, one of the first things you will want to become familiar with is Pennsylvania's ignition interlock laws.

An ignition interlock is a device that is installed into a car. It allows someone who has been convicted of a DUI offense to continue driving, but only if the device indicates they're sober.

Here are several things you will want to know about Pennsylvania's ignition interlock law:

  • When Do I Need to Install an Ignition Interlock Device? Pennsylvania law requires that someone who has been convicted of a second or subsequent DUI offense to install an ignition interlock system in each motor vehicle they own, operate, or lease for one year.

  • Do I Need to Serve My License Suspension If I Install the Device? Yes. Individuals are not eligible for ignition interlock until they have served their driving suspension of at least one year.

  • Are Accelerated Rehabilitative Disposition (ARD) Positions Counted as Prior Offenses? If you have previously been arrested for a DUI and it was resolved through the ARD procedure, that incident will be counted as a prior DUI conviction for purposes of the ignition interlock law.

  • How Does the Ignition Interlock System Work? The device prevents those under the influence of alcohol from operating the vehicle. So you will be required to blow into the device before starting the vehicle. If the device detects alcohol, it will "lock" the car and prevent you from driving.

  • How Much Does the Ignition Interlock System Cost? Probably the biggest penalty of installing an ignition interlock device is the cost of maintaining one. On average, these devices can cost about $1,000 a month per system.

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