Is there a US Map that shows Interstate highway traffic volumes?

[NE2]

I think he was looking at the yellow - there's about the same amount of red on I-5 and I-95.

[agentsteel53]

I wonder what's going on north of Seattle.  shitty Washington drivers holding everyone up?

also I-35 heading north out of DFW... WTF?

and I-15 in northern Montana?  there's gotta be some border effect going on there, because it's all plains... my experience with that segment of 15 was that everyone, cars and trucks alike, were doing 80.

[kkt]

I wonder what's going on north of Seattle.  shitty Washington drivers holding everyone up?

It's not just north of Seattle, from Olympia to the Canadian border is all yellow.  It's just heavy traffic and not much of any alternative routes.

[agentsteel53]

It's not just north of Seattle, from Olympia to the Canadian border is all yellow.  It's just heavy traffic and not much of any alternative routes.

I get Olympia to Seattle: it's urban.  but north of Marysville it should definitely open up some.

[kkt]

It's not just north of Seattle, from Olympia to the Canadian border is all yellow.  It's just heavy traffic and not much of any alternative routes.

I get Olympia to Seattle: it's urban.  but north of Marysville it should definitely open up some.

Yeah, in the past that was the case, but there's been a lot development going in there unaccompanied by road improvements.  There's still a rural gap between the new casino in the north end of Marysville and Mt. Vernon, and a gap in the Chuckanut Mountains between the north end of Burlington and the south end of Bellingham.  Maybe those gaps are too small to show up in the statistics.

[agentsteel53]

Yeah, in the past that was the case, but there's been a lot development going in there unaccompanied by road improvements.  There's still a rural gap between the new casino in the north end of Marysville and Mt. Vernon, and a gap in the Chuckanut Mountains between the north end of Burlington and the south end of Bellingham.  Maybe those gaps are too small to show up in the statistics.

I just drove both of those segments a couple weeks ago, and it seemed like traffic was moving along okay.  speed limit 70 and all - and you didn't get a statistically meaningful quantity of left lane hogs... i.e. you could generally go around them on the right.

[myosh_tino]

What's fascinating to me is the map of truck travel speeds, shown here:


This is a good indicator of the choke points on the Interstate network for truck traffic.

In particular, look at the sluggish pace of the I-5 corridor. Even the I-95 corridor manages to sustain higher truck travel speeds.

Speed limits play an important role on I-5 too.  In California, the speed limit for all trucks is 55 MPH regardless of the auto speed limit (65-70 MPH).  I believe Oregon also enforces a 55 MPH speed limit for trucks also.

[Kacie Jane]

and a gap in the Chuckanut Mountains between the north end of Burlington and the south end of Bellingham.

Mountains that a laden truck would have a difficult time going much faster than 55 over.

[corco]

and I-15 in northern Montana?  there's gotta be some border effect going on there, because it's all plains... my experience with that segment of 15 was that everyone, cars and trucks alike, were doing 80.

That one's weird- that northern part is all plains, but just south of it where it turns back to green it gets to be really windy from Great Falls to Butte

[hobsini2]

and I-15 in northern Montana?  there's gotta be some border effect going on there, because it's all plains... my experience with that segment of 15 was that everyone, cars and trucks alike, were doing 80.

That one's weird- that northern part is all plains, but just south of it where it turns back to green it gets to be really windy from Great Falls to Butte

Could that be because it also takes in to account weather conditions? I know northern Montana can get heavy snow for 5 months. It also looks like it takes in to account the amount of time to cross the border too.