Best Time to Drive from Boston to Sudbury

Right now (8:20 am EST): about 35 minutes via I-90 West, usually 33 at this time.

Only 20% 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 Boston to Sudbury 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	32	34	44	54	51	41	36	36	37	44	52	60	57	47	35	33	35
Tue	31	34	49	63	59	50	39	36	36	46	63	85	77	58	39	34	35
Wed	31	34	47	62	58	51	41	36	37	48	74	84	75	64	42	35	37
Thu	32	34	47	61	57	48	40	37	38	50	82	93	88	70	42	35	36
Fri	32	33	39	44	41	37	38	39	44	57	88	88	70	52	41	36	35
Sat	34	33	32	32	33	35	37	40	41	42	42	42	40	39	37	35	33
Sun	34	31	31	31	32	33	35	38	40	41	41	41	39	37	37	35	35

About this drive

On weekdays the 21-mile drive from Boston to Sudbury (via I-90 West) usually takes as little as 31 minutes and up to 94 minutes, when leaving around 3:30 pm on Fridays. The fastest times to leave are before 6:30 am. Midday (11 am to 2 pm) it takes about 40 minutes. On weekends it is slowest around 3:30 pm on Saturdays (43 minutes).

About 9 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 12 miles surface streets (22 to 67 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Boston to central Sudbury 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 Boston to Sudbury?

On weekdays, leave before 6:30 am. The drive usually takes about 31 minutes then, versus up to 94 minutes at the worst times.

How long does it take to drive from Boston to Sudbury?

The 21-mile drive usually takes 31 to 94 minutes on weekdays, depending on when you leave, and about 40 minutes midday.

When is traffic worst from Boston to Sudbury?

Leaving around 3:30 pm on Fridays is usually slowest, about 94 minutes.

Freeways on this drive

I-90 West in Boston (9 miles)

Boston traffic right now · Boston traffic tomorrow

More drives

Sudbury to Boston (return trip) · Boston to Quincy · Boston to Framingham · Boston to Worcester · Boston to Lowell · Boston to Burlington MA · Boston to Woburn · Boston to Braintree · Boston to Andover · Boston to Brockton · Boston to Plymouth MA · Boston to Natick

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	32	34	44	54	51	41	36	36	37	44	52	60	57	47	35	33	35
Tue	31	34	49	63	59	50	39	36	36	46	63	85	77	58	39	34	35
Wed	31	34	47	62	58	51	41	36	37	48	74	84	75	64	42	35	37
Thu	32	34	47	61	57	48	40	37	38	50	82	93	88	70	42	35	36
Fri	32	33	39	44	41	37	38	39	44	57	88	88	70	52	41	36	35
Sat	34	33	32	32	33	35	37	40	41	42	42	42	40	39	37	35	33
Sun	34	31	31	31	32	33	35	38	40	41	41	41	39	37	37	35	35

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	32	34	44	54	51	41	36	36	37	44	52	60	57	47	35	33	35
Tue	31	34	49	63	59	50	39	36	36	46	63	85	77	58	39	34	35
Wed	31	34	47	62	58	51	41	36	37	48	74	84	75	64	42	35	37
Thu	32	34	47	61	57	48	40	37	38	50	82	93	88	70	42	35	36
Fri	32	33	39	44	41	37	38	39	44	57	88	88	70	52	41	36	35
Sat	34	33	32	32	33	35	37	40	41	42	42	42	40	39	37	35	33
Sun	34	31	31	31	32	33	35	38	40	41	41	41	39	37	37	35	35

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	32	34	44	54	51	41	36	36	37	44	52	60	57	47	35	33	35
Tue	31	34	49	63	59	50	39	36	36	46	63	85	77	58	39	34	35
Wed	31	34	47	62	58	51	41	36	37	48	74	84	75	64	42	35	37
Thu	32	34	47	61	57	48	40	37	38	50	82	93	88	70	42	35	36
Fri	32	33	39	44	41	37	38	39	44	57	88	88	70	52	41	36	35
Sat	34	33	32	32	33	35	37	40	41	42	42	42	40	39	37	35	33
Sun	34	31	31	31	32	33	35	38	40	41	41	41	39	37	37	35	35