Best Time to Drive from Simi Valley to Altadena

Right now (6:51 pm PDT): about 45 minutes via SR-118 East and I-210 East, usually 42 at this time.

Only 12% 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

Minutes from Simi Valley to Altadena by day and time you leave (local time)
Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	40	42	48	53	47	44	44	44	44	43	42	41	41	41	42	41	40
Tue	40	44	55	59	53	47	45	46	45	44	42	42	41	41	42	44	41
Wed	40	44	55	67	55	47	46	45	45	45	43	43	41	41	43	43	41
Thu	40	44	54	58	49	46	47	45	47	45	44	43	42	41	43	44	42
Fri	41	45	47	50	46	46	47	46	45	45	44	45	44	43	43	41	41
Sat	41	40	41	41	41	42	42	43	46	43	43	43	43	40	40	40	40
Sun	40	40	40	40	40	40	41	41	41	41	41	41	41	40	40	41	40

About this drive

On weekdays the 43-mile drive from Simi Valley to Altadena (via SR-118 East and I-210 East) usually takes as little as 39 minutes and up to 70 minutes, when leaving around 7:30 am on Tuesdays. The fastest times to leave are before 6 am or after 3 pm. Midday (11 am to 2 pm) it takes about 45 minutes. On weekends it is slowest around 1 pm on Saturdays (46 minutes).

About 39 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 4 miles surface streets (6 to 8 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Simi Valley to central Altadena 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 Simi Valley to Altadena?

On weekdays, leave before 6 am or after 3 pm. The drive usually takes about 39 minutes then, versus up to 70 minutes at the worst times.

How long does it take to drive from Simi Valley to Altadena?

The 43-mile drive usually takes 39 to 70 minutes on weekdays, depending on when you leave, and about 45 minutes midday.

When is traffic worst from Simi Valley to Altadena?

Leaving around 7:30 am on Tuesdays is usually slowest, about 70 minutes.

Freeways on this drive

SR-118 East in Los Angeles (23 miles) · I-210 East in Los Angeles (16 miles)

Los Angeles traffic right now · Los Angeles traffic tomorrow

More drives

Altadena to Simi Valley (return trip) · Simi Valley to Los Angeles · Simi Valley to Santa Monica · Simi Valley to Pasadena · Simi Valley to Long Beach · Simi Valley to West Covina · Simi Valley to Burbank · Simi Valley to Glendale · Simi Valley to Santa Clarita · Simi Valley to Van Nuys · Simi Valley to Torrance · Simi Valley to LAX

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	40	42	48	53	47	44	44	44	44	43	42	41	41	41	42	41	40
Tue	40	44	55	59	53	47	45	46	45	44	42	42	41	41	42	44	41
Wed	40	44	55	67	55	47	46	45	45	45	43	43	41	41	43	43	41
Thu	40	44	54	58	49	46	47	45	47	45	44	43	42	41	43	44	42
Fri	41	45	47	50	46	46	47	46	45	45	44	45	44	43	43	41	41
Sat	41	40	41	41	41	42	42	43	46	43	43	43	43	40	40	40	40
Sun	40	40	40	40	40	40	41	41	41	41	41	41	41	40	40	41	40

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	40	42	48	53	47	44	44	44	44	43	42	41	41	41	42	41	40
Tue	40	44	55	59	53	47	45	46	45	44	42	42	41	41	42	44	41
Wed	40	44	55	67	55	47	46	45	45	45	43	43	41	41	43	43	41
Thu	40	44	54	58	49	46	47	45	47	45	44	43	42	41	43	44	42
Fri	41	45	47	50	46	46	47	46	45	45	44	45	44	43	43	41	41
Sat	41	40	41	41	41	42	42	43	46	43	43	43	43	40	40	40	40
Sun	40	40	40	40	40	40	41	41	41	41	41	41	41	40	40	41	40

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	40	42	48	53	47	44	44	44	44	43	42	41	41	41	42	41	40
Tue	40	44	55	59	53	47	45	46	45	44	42	42	41	41	42	44	41
Wed	40	44	55	67	55	47	46	45	45	45	43	43	41	41	43	43	41
Thu	40	44	54	58	49	46	47	45	47	45	44	43	42	41	43	44	42
Fri	41	45	47	50	46	46	47	46	45	45	44	45	44	43	43	41	41
Sat	41	40	41	41	41	42	42	43	46	43	43	43	43	40	40	40	40
Sun	40	40	40	40	40	40	41	41	41	41	41	41	41	40	40	41	40