Traffic Predict
Best Time to Drive from Costa Mesa to Diamond Bar
Right now (3:20 pm PST): about 35 minutes via SR-57 North and SR-55 North, usually 33 at this time.
None 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.
Typical drive time by departure time
| Leave | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon | 27 | 28 | 29 | 32 | 32 | 31 | 31 | 31 | 32 | 36 | 40 | 45 | 45 | 41 | 33 | 29 | 28 |
| Tue | 27 | 28 | 29 | 33 | 32 | 32 | 32 | 32 | 34 | 37 | 42 | 50 | 54 | 49 | 40 | 30 | 28 |
| Wed | 27 | 28 | 30 | 33 | 32 | 32 | 31 | 32 | 35 | 38 | 42 | 46 | 52 | 49 | 38 | 30 | 28 |
| Thu | 27 | 28 | 29 | 32 | 32 | 33 | 32 | 32 | 33 | 36 | 40 | 47 | 48 | 45 | 37 | 30 | 28 |
| Fri | 27 | 28 | 30 | 31 | 31 | 31 | 32 | 33 | 35 | 39 | 44 | 45 | 49 | 39 | 33 | 30 | 28 |
| Sat | 27 | 27 | 28 | 28 | 29 | 29 | 30 | 30 | 30 | 31 | 32 | 32 | 33 | 31 | 31 | 30 | 28 |
| Sun | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 28 |
About this drive
On weekdays the 31-mile drive from Costa Mesa to Diamond Bar (via SR-57 North and SR-55 North) usually takes as little as 27 minutes and up to 54 minutes, when leaving around 5 pm on Tuesdays. The fastest times to leave are before 7:30 am or after 8:30 pm. Midday (11 am to 2 pm) it takes about 33 minutes. On weekends it is slowest around 3:30 pm on Saturdays (33 minutes).
Drive times are measured from central Costa Mesa to central Diamond Bar 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 Costa Mesa to Diamond Bar?
On weekdays, leave before 7:30 am or after 8:30 pm. The drive usually takes about 27 minutes then, versus up to 54 minutes at the worst times.
How long does it take to drive from Costa Mesa to Diamond Bar?
The 31-mile drive usually takes 27 to 54 minutes on weekdays, depending on when you leave, and about 33 minutes midday.
When is traffic worst from Costa Mesa to Diamond Bar?
Leaving around 5 pm on Tuesdays is usually slowest, about 54 minutes.
Freeways on this drive
SR-57 North in Orange County (12 miles) · SR-55 North in Orange County (8 miles) · I-5 North in Orange County (4 miles) · SR-57 North in Los Angeles (4 miles) · SR-60 East in Los Angeles (2 miles)
Orange County traffic right now · Orange County traffic tomorrow · Los Angeles traffic right now · Los Angeles traffic tomorrow
More drives
Diamond Bar to Costa Mesa (return trip) · Costa Mesa to Los Angeles · Costa Mesa to Anaheim · Costa Mesa to Riverside · Costa Mesa to Santa Ana · Costa Mesa to Irvine · Costa Mesa to San Bernardino · Costa Mesa to Fontana · Costa Mesa to Moreno Valley · Costa Mesa to Glendale · Costa Mesa to Santa Clarita · Costa Mesa to Oceanside