Mobile cell signal along highway I (Southern CA to San Jose)

Despite coverage maps, I've found over the past years of traveling from Texas to Florida to Maine to California to Washington that cell phone coverage is spotty at best if you get away from major interstates/ highways.

Especially if the road travels through mountains or along coasts.

Drove up US-101 from Tillamook, OR to near Aberdeen, WA yesterday. Had ATT coverage 80% of the distance til we crossed the Columbia River, and less than 25% of the time up through Washington. Verizon coverage was a little better in WA, a little less in OR. (Yes, we have both AT&T and Verizon cell phones, because we've found both have gaps in coverage, even along the east coast.)

Huge stretches of US-101 are with no cell coverage at all along the west coast.

When we drove down CA-1 from Monterey to Big Sur in April - there was almost no cell coverage at all once 10 miles south of Carmel. Wasn't even enough coverage in the town of Big Sur to use Facebook. Just SMS only.

Our general rule is to expect no cell coverage when we are 10 miles or more from a city of over 5,000 population.

We've had no cell phone service at campgrounds for 28 days this year in California - Jamul just outside San Diego, Groveland near Yosemite NP, Sanger near Fresno, near Eureka.

No cell service for 17 days in Oregon in Trail near Medford and Pacific City.

No cell service for 44 days in Washington - near Chehalis, Monroe near Seattle, La Conner, and near Ocean Shores.

There's also a major landslide that will take time to clear (once they decide what to do).

http://www.mercurynews.com/2017/07/19/highway-1-opens-at-pauls-slide-in-big-sur-mud-creek-still-being-assessed/

According to Cruz, construction of the new Pfeiffer Canyon Bridge is on schedule for completion by mid- to late-September.

Mud Creek had a major slide in May, losing 5 million cubic yards of material. Cruz said geotechnical and radar assessments continue at the site and it remains impassable.

Tmobile's coverage map is white for a large area between San Simeon to Carmel - basically all of Big Sur affected by these road closures.

No cell service at Kirk or Plaskett Creek USFS CGs, or on much of the route between Ragged Point and Monterey

I believe the OP was asking about T-Mobile cell strength not the road condition?? The bridge may be repaired by the time they make the trip.

You can get as far as Ragged Point per the local TV news tonight. Then you have to backtrack to Hwy. 46 to 101 go further north.

Bridge and a slide. Due continued movement, CA hasn't started to fix. :( This IS California Hwy. 1 and part of what makes it magical between Cambria and Monterey.

CodyClassB wrote:
How is T-Mobile cell signal along highway I (Southern CA San Jose) ? How is the signal in state Parks along the routes?

Thanks

Hwy. 1 is closed, the bridge fell down at Big Sur:(