Traffic Predict
Best Time to Drive from Corona to Diamond Bar
Right now (6:06 pm PDT): about 22 minutes via SR-71 South and SR-91 West, usually 23 at this time.
Only 68% 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 | 20 | 36 | 55 | 47 | 36 | 28 | 26 | 24 | 23 | 23 | 25 | 27 | 27 | 23 | 21 | 20 | 20 |
| Tue | 19 | 36 | 54 | 46 | 39 | 30 | 25 | 24 | 23 | 23 | 26 | 28 | 26 | 25 | 20 | 20 | 20 |
| Wed | 20 | 38 | 49 | 48 | 43 | 30 | 26 | 24 | 23 | 24 | 26 | 27 | 28 | 26 | 21 | 20 | 20 |
| Thu | 20 | 35 | 53 | 45 | 34 | 29 | 26 | 24 | 24 | 24 | 27 | 30 | 30 | 26 | 22 | 21 | 20 |
| Fri | 20 | 27 | 30 | 26 | 24 | 25 | 24 | 24 | 25 | 30 | 32 | 30 | 31 | 26 | 22 | 20 | 20 |
| Sat | 20 | 21 | 21 | 21 | 21 | 24 | 26 | 25 | 26 | 26 | 24 | 25 | 26 | 23 | 21 | 20 | 20 |
| Sun | 20 | 20 | 20 | 20 | 20 | 22 | 25 | 25 | 24 | 23 | 22 | 21 | 21 | 21 | 21 | 21 | 20 |
About this drive
On weekdays the 21-mile drive from Corona to Diamond Bar (via SR-71 South and SR-91 West) usually takes as little as 19 minutes and up to 55 minutes, when leaving around 7 am on Mondays. The fastest times to leave are before 5:30 am or after 7 pm. Midday (11 am to 2 pm) it takes about 24 minutes. On weekends it is slowest around 11:30 am on Saturdays (27 minutes).
About 20 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 1.5 miles surface streets (2 to 5 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Corona 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 Corona to Diamond Bar?
On weekdays, leave before 5:30 am or after 7 pm. The drive usually takes about 19 minutes then, versus up to 55 minutes at the worst times.
How long does it take to drive from Corona to Diamond Bar?
The 21-mile drive usually takes 19 to 55 minutes on weekdays, depending on when you leave, and about 24 minutes midday.
When is traffic worst from Corona to Diamond Bar?
Leaving around 7 am on Mondays is usually slowest, about 55 minutes.
Freeways on this drive
SR-91 West in Orange County (7 miles) · SR-71 South in Los Angeles (4 miles) · SR-60 West in Los Angeles (4 miles) · SR-71 South in Inland Empire (2 miles) · SR-71 South in Orange County (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 Corona (return trip) · Corona to Los Angeles · Corona to Santa Monica · Corona to Pasadena · Corona to Long Beach · Corona to West Covina · Corona to Burbank · Corona to Glendale · Corona to Santa Clarita · Corona to Van Nuys · Corona to Torrance · Corona to LAX