The rollout of Arlington’s smartphone parking system is expected to be complete by the end of the weekend.

Metered parking has been gradually adopting the Parkmobile system — which allows users to download the Parkmobile app and use the app to connect to their credit card and pay the meter, including sending notifications when a session is about to expire — neighborhood by neighborhood. It launched in Crystal City and Shirlington in July, in Clarendon and Ballston last month and in Courthouse, Rosslyn and Columbia Pike in the last two weeks.

According to county Dept. of Environmental Services spokeswoman Jessica Baxter, the final phase of the system will be done by the end of the weekend, meaning all meters run by the county in Arlington will be eligible to be paid via smartphone. The kiosks and coin-operated machines are still functional, if motorists prefer to pay with other methods.

Baxter said the system had 34,000 transactions in September. Initially the rollout of the service was expected to stretch into 2015, but due to the widespread use of the system, the county accelerated the app’s deployment. Last month, Columbia Pike had been targeted for a winter expansion of Parkmobile.