Hawaii's state sheriffs are cracking down on dangerous driving on Oahu, which is good news for road safety just as the risky holiday driving season begins.

• State deputy sheriffs ran two big enforcement operations this week, stopping about 95 cars and writing 86 tickets, most for speeding.
• Seven people were arrested in a single night on the H1 and H2 freeways for things like extreme speeding, drunk driving, and driving without a license or insurance.
• Since the weekend, Honolulu police have separately arrested 21 people for drunk driving and several more for driving without a license.
• Officials say the extra patrols, funded partly by the state transportation department, target known trouble spots where people speed, especially at night, and are meant to head off the crashes, injuries, and deaths that tend to spike around the holidays.
• Deputy sheriffs have the same enforcement powers as police and will use unmarked cars and checkpoints alongside Honolulu police through the holidays.

Outlook: Expect continued stepped-up patrols, more checkpoints, and unmarked cars on Oahu roads through the holiday season.