Best Time to Drive from Santa Rosa to Union City

Right now (7:51 pm PST): about 84 minutes via US-101 South and I-880 South, usually 74 at this time.

Only 61% of this drive is measured by working traffic sensors right now. The rest is estimated from nearby sensors, typical speeds and street traffic, so times can be off. Why so few sensors work.

About this drive

On weekdays the 80-mile drive from Santa Rosa to Union City (via US-101 South and I-880 South) usually takes as little as 73 minutes and up to 143 minutes, when leaving around 7 am on Tuesdays. The fastest times to leave are before 5:30 am or after 6:30 pm. Midday (11 am to 2 pm) it takes about 88 minutes. On weekends it is slowest around 3 pm on Saturdays (95 minutes).

About 76 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 4 miles surface streets (5 to 12 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Santa Rosa to central Union City along the route on the map. Starting or ending elsewhere in a big city can add or save several minutes.

Simulated from typical freeway speeds at each point of the drive for the time you would reach it, from every 5-minute reading we have recorded. We don't have sensors on surface streets yet, so the time on them is estimated from how congested the freeways around each end of the drive are at that time, in both directions: streets jam when the freeways do.

Questions

What is the best time to drive from Santa Rosa to Union City?

On weekdays, leave before 5:30 am or after 6:30 pm. The drive usually takes about 73 minutes then, versus up to 143 minutes at the worst times.

How long does it take to drive from Santa Rosa to Union City?

The 80-mile drive usually takes 73 to 143 minutes on weekdays, depending on when you leave, and about 88 minutes midday.

When is traffic worst from Santa Rosa to Union City?

Leaving around 7 am on Tuesdays is usually slowest, about 143 minutes.

Freeways on this drive

US-101 South in Bay Area (36 miles) · I-880 South in Bay Area (21 miles) · I-580 West in Bay Area (13 miles) · I-80 West in Bay Area (5 miles)

Bay Area traffic right now · Bay Area traffic tomorrow

More drives

Union City to Santa Rosa (return trip) · Santa Rosa to San Francisco · Santa Rosa to Sacramento · Santa Rosa to Oakland · Santa Rosa to Hayward · Santa Rosa to Concord · Santa Rosa to Vallejo · Santa Rosa to Berkeley · Santa Rosa to Fairfield · Santa Rosa to Antioch · Santa Rosa to Richmond · Santa Rosa to Daly City

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