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Traffic heat map of Alpine County, California: 45 miles of roads shaded from blue (light) to red (heavy traffic), busiest on CA 88 and Luther Pass Road

Alpine County, California Traffic Counts

Our Alpine County, California traffic data covers 300 road segments over 45 road miles, with an average segment of just 785 ft. Its roads are the quietest of any county in California, at 1,433 vehicles a day on average. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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Total Traffic Volume & Performance in Alpine County, California

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day1,433
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

10.2%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

49.0 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

2.9%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

50.6 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$109,514

Our data shows 1,433 vehicles per day on the average road in Alpine County, California, and 86,559 vehicle-miles traveled per day (≈31.6 million per year) across its 45 miles of monitored roads. At 10.2%, the truck share runs above the 7.8% across California: about 1 in 10 vehicles.

The quietest roads of any county in California

At 1,433 vehicles per day, the average monitored road in Alpine carries 89% less traffic than the state average of 12,766, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is less than 0.1% of California's statewide total. Alpine stands out as having the lowest traffic volume in California - 1,433 vehicles per day.

The average trip takes 49.0 minutes, 42% higher than the state level. Its average travel time of 49.0 minutes is longer than 96% of counties in California.

Congestion runs 89% lower than the state level, at a ratio of 2.9%, which means smoother traffic flow - delays are rare enough to plan travel times almost to the minute.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Alpine County, California, the peak hour concentrates about 9% of the day's traffic.

Alpine County vs. California Traffic Comparison

Of the four measures, average daily traffic per road differs most: Alpine County runs 89% below the California average. Its average travel time, by contrast, is 42% above.

MetricAlpine CountyCalifornia averageDifference
Traffic1,43312,766-88.8%
Truck % (Total Traffic)10.2%7.8%+31.7%
Avg. Travel Time49.0 min34.5 min+42.1%

How Alpine County compares

Alpine County moves the least traffic of its nearby counties and cities

Against the 4 nearest areas, Alpine County moves 4.5% of the total daily travel and is 79.3% less congested; it has the quietest roads of the five. Trips here run longer without running slower: distance, not congestion, is what drivers spend their time on.

Alpine County and the 4 nearest county-level areas by centroid distance, with the California average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Alpine County1,43310.2%86,55949.0 min2.9%
Douglas County, Nevada6,2047.2%1,369,82426.8 min12.9%
Carson City, Nevada6,5337.2%972,29834.2 min13.4%
El Dorado County, California5,3146.4%4,239,40830.3 min14.9%
Tuolumne County, California4,2846.5%1,187,91132.4 min15.5%
California average12,7667.8%N/A34.5 min27.4%

Alpine County ranked within California

Alpine County sits in California's top three on average travel time.

Alpine County ranked among 58 county-level areas in California (1 = highest).
MeasureAlpine CountyCalifornia rank
Traffic volume (AADT)1,433#58 of 58
Average travel time49.0 min#3 of 58
Average driver income$109,514#16 of 58
Average driver age50.6 yrs#13 of 58

Alpine County ranks #3 of 58 on average travel time but #58 of 58 on average daily traffic volume. Some of the longest trips in California on some of its emptiest roads - distance, not congestion, is what sets travel time here.

Busiest roads in Alpine County, California

The three busiest roads in Alpine County average 2,768 vehicles a day, 93% more than the county average of 1,433 across all its monitored roads.

CA 88 leads with 4,137 vehicles a day, 399 of them trucks (9.7%). It also carries the most trucks.

CA 4 is a local road at heart: the median trip using it lasts 25.5 minutes, against 49.0 for the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1CA 88Primary road · 4,137vehicles399trucks · 9.7%
Road class
Primary road
Median trip time
42.4 min
Drivers’ median age
50.3 yrs
Drivers’ average income
$107,326

CA 88 peaks at 4,137 vehicles a day, 2.9 times the county average; trucks are 9.7% of it, below the county-wide 10.2%.

2Luther Pass RoadPrimary road · 2,832vehicles314trucks · 11.1%
Road class
Primary road
Median trip time
42.4 min

Luther Pass Road carries 2.0 times the county average at its busiest, 314 of them trucks (11.1%, above the county-wide 10.2%).

3CA 4Secondary road · 1,336vehicles122trucks · 9.2%
Road class
Secondary road
Congestion ratio
2.9%
Median trip time
25.5 min

Even at its busiest, CA 4 carries 7% less than the county average; trucks are 9.2% of it, below the county-wide 10.2%.

4CA 88 / CA 89Primary road · 1,245vehicles156trucks · 12.5%
Road class
Primary road
Median trip time
55.6 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$110,781

CA 88 / CA 89 is a quieter road: its busiest stretch carries 13% less than the county average; trucks are 12.5% of it, above the county-wide 10.2%.

5Diamond Valley RoadTertiary road · 750vehicles50trucks · 6.7%
Road class
Tertiary road
Median trip time
31.9 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$110,781

Trips on Diamond Valley Road are short, a median 31.9 minutes against 49.0 county-wide, so it mostly serves local errands and commutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1CA 88Primary road · #1 by traffic4,137vehicles399trucks · 9.7%
2Luther Pass RoadPrimary road · #2 by traffic2,832vehicles314trucks · 11.1%
3CA 88 / CA 89Primary road · #4 by traffic1,245vehicles156trucks · 12.5%
4CA 4Secondary road · #3 by traffic1,336vehicles122trucks · 9.2%
5CA 89Secondary road · 642vehicles86trucks · 13.3%
Road class
Secondary road
Median trip time
40.7 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$110,781

Even at its busiest, CA 89 carries 55% less than the county average; trucks are 13.3% of it, above the county-wide 10.2%.

How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

AlpineDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near Alpine County

The same traffic breakdown for the areas closest to Alpine County, California.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.