Best Time to Drive from Diamond Bar to Rancho Cucamonga

Right now (6:48 pm PDT): about 20 minutes via I-10 East and SR-57 North, usually 19 at this time.

Only 54% 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 18-mile drive from Diamond Bar to Rancho Cucamonga (via I-10 East and SR-57 North) usually takes as little as 18 minutes and up to 31 minutes, when leaving around 4 pm on Fridays. The fastest times to leave are before 6:30 am or after 9 pm. Midday (11 am to 2 pm) it takes about 22 minutes. On weekends it is slowest around 5 pm on Saturdays (23 minutes).

About 14 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 4 miles surface streets (6 to 9 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Diamond Bar to central Rancho Cucamonga 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 Diamond Bar to Rancho Cucamonga?

On weekdays, leave before 6:30 am or after 9 pm. The drive usually takes about 18 minutes then, versus up to 31 minutes at the worst times.

How long does it take to drive from Diamond Bar to Rancho Cucamonga?

The 18-mile drive usually takes 18 to 31 minutes on weekdays, depending on when you leave, and about 22 minutes midday.

When is traffic worst from Diamond Bar to Rancho Cucamonga?

Leaving around 4 pm on Fridays is usually slowest, about 31 minutes.

Freeways on this drive

I-10 East in Los Angeles (5 miles) · I-10 East in Inland Empire (5 miles) · SR-57 North in Los Angeles (4 miles)

Los Angeles traffic right now · Los Angeles traffic tomorrow · Inland Empire traffic right now · Inland Empire traffic tomorrow

More drives

Rancho Cucamonga to Diamond Bar (return trip) · Diamond Bar to Los Angeles · Diamond Bar to Long Beach · Diamond Bar to Anaheim · Diamond Bar to Riverside · Diamond Bar to Santa Ana · Diamond Bar to Irvine · Diamond Bar to San Bernardino · Diamond Bar to Fontana · Diamond Bar to Moreno Valley · Diamond Bar to Huntington Beach · Diamond Bar to Glendale

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