Guide
Road closures on this coast
Checked September 24, 2026 against Caltrans Districts 1, 4, 5, 7, 11 and 12, the California Highway Patrol, Humboldt County and Del Norte County.
The Highways tile repeats what Caltrans publishes about the roads these towns depend on. On much of this coast they have no alternative: one highway runs along the shore, and the ways inland are few enough to name. That is what makes a closure there different from a closure somewhere with a grid.
The roads each board watches
Each board reads the lane closures of its own Caltrans district, for the state routes its towns depend on, and each is set out below, north to south and then round the bay.
On the Del Norte and Humboldt boards
Caltrans District 1 covers Del Norte, Humboldt, Mendocino and Lake counties. On the north coast two of its routes carry the coast and the way out, US 101 and US 199, and six shorter state routes reach the towns off them.
| Route | Runs |
|---|---|
| US 101 | the spine: from the state line through Crescent City and Klamath, past Orick and Trinidad to Arcata and Eureka, then Fortuna and south past Garberville |
| US 199 | Crescent City up the Smith River to the state line — the inland way out, and the only alternative to 101 when the coast road shuts |
| SR 197 | the short link between 101 at Fort Dick and 199 on the Smith River |
| SR 299 | Arcata east through Blue Lake and over Berry Summit, as far as the Trinity County line |
| SR 255 | Arcata out to Manila and Samoa and over the Samoa Bridge into Eureka — the peninsula’s only road |
| SR 211 | 101 at Fernbridge into Ferndale — Ferndale’s only road |
| SR 36 | 101 at Alton east through Bridgeville, as far as the Trinity County line |
| SR 254 | the Avenue of the Giants, Sylvandale to Pepperwood |
On the north coast boards, the six state routes joined the tile on 18 September 2026. Until then it read 101 and 199 only, because the only geography to hand was the feed itself — a night’s closures — and a box drawn round those would have found a closure only where one had already been seen. Each route is now bounded by Caltrans’ own line work for it, cut at our county lines: 299 and 36 stop at the Trinity County line, so a closure at Buckhorn Summit or east of Bridgeville is not on this tile. For the whole length of either, and for chain controls anywhere, use QuickMap.
And on the Mendocino coast board
| Route | Runs |
|---|---|
| SR 1 | the coast highway, and every town on that board is on it: Gualala north through Point Arena, Elk, Albion, Little River, Mendocino and Fort Bragg to Westport |
| SR 20 | Fort Bragg east through Jackson State Forest to Willits and 101 — the north coast’s way inland |
| SR 128 | SR 1 at the Navarro River east up Anderson Valley through Boonville to Cloverdale — the south coast’s way inland |
| US 101 | Hopland and Ukiah north through Willits and Laytonville to Leggett, where SR 1 meets it. Thirty miles inland, and nobody’s town road on that coast — but it is how everybody reaches it |
On that board SR 1 is the only road most of those towns have, and it is cut into the cliff for much of its length. A slide there is not a delay, it is a detour of fifty miles over SR 20 or SR 128, which is why both of those are on the tile even though no town sits on them.
And on the Sonoma and Marin board
| Route | Runs |
|---|---|
| SR 1 | the coast highway again, and the road every town on that board is reached by: the Gualala River south through The Sea Ranch, Stewarts Point, Fort Ross and Jenner to Bodega Bay, then inland across Marin by Valley Ford, Olema, Stinson Beach and Muir Beach to US 101 at Marin City |
| SR 116 | Jenner inland along the Russian River through Duncans Mills and Guerneville to Sebastopol and 101 — the north half of that coast’s way out |
| US 101 | Petaluma south through Novato and San Rafael to the Golden Gate. Inland of the ocean towns, and how everybody reaches them; on Marin’s bay side it is San Rafael’s, Larkspur’s and Sausalito’s own road |
| SR 37 | across the top of the bay, Novato to Vallejo. Marin’s way east, and the one road here that shuts for water rather than rock |
| I-580 | I-580 from US 101 at San Rafael over the Richmond-San Rafael Bridge — Larkspur’s and San Rafael’s way to the East Bay |
| SR 131 | SR 131, Tiburon Boulevard, from US 101 to Tiburon — the only road onto the peninsula |
That board is Caltrans District 4, not District 1, and this site reads a different file for it. A board pointed at the wrong district matches none of its own roads and reports a permanently clear coast, which is the quiet way this could have gone wrong.
And on the San Mateo board
This is the simplest road map on the site and the least forgiving. One highway runs along the coast and three cut through the ridge behind it. There is nothing else. Pescadero to Redwood City is either SR 1 north to SR 84 or an unnumbered county road through the redwoods, so when SR 1 shuts at Devil’s Slide or a slide takes SR 84, that is not an inconvenience — it is the road out.
| Route | Runs |
|---|---|
| SR 1 | the coast highway a third time: Pacifica and the Devil’s Slide tunnels south through Montara, Moss Beach, Half Moon Bay and San Gregorio to Pescadero and the Santa Cruz County line |
| SR 92 | Half Moon Bay east over the hill to San Mateo and I–280 — the main way in and out of the mid-coast, and the one most of that board’s traffic uses |
| SR 84 | San Gregorio east through La Honda and Woodside to Redwood City — the south coast’s own way over the ridge |
| SR 35 | Skyline Boulevard, along the crest from Daly City south past Sky Londa. Not a coast road, and the alternative when the coast road shuts |
| US 101 | US 101, the Bayshore Freeway from South San Francisco past the airport through San Mateo to Redwood City — the bay-side rows’ own road |
| I-380 | I-380 from US 101 at the airport to I-280 |
That board is District 4 as well. Its SR 1 is deliberately bounded to this county: Caltrans files 19th Avenue through San Francisco and the Marin headlands under the same route number, and a backup on 19th Avenue is not a Pescadero reader’s problem.
And on the Santa Cruz board
The first board on Caltrans District 5, which runs from here down through Monterey and San Luis Obispo to Santa Barbara. The file is the same shape as the two above; the county line is what changes. District 5 stops at the Santa Clara line, so SR 17 north of the summit and SR 152 east of Hecker Pass are District 4’s records, in a file this board does not read. A slide on the Los Gatos side of 17 is real, it is the way home for half the county, and it is not on this tile: for that stretch use QuickMap.
| Route | Runs |
|---|---|
| SR 1 | the coast highway: Waddell Creek and Davenport south to Santa Cruz, then the freeway through Capitola and Aptos to Watsonville and the Pajaro River. Boxed to the county, so Devil’s Slide and Big Sur stay off it |
| SR 17 | Santa Cruz up over the summit toward Los Gatos and San Jose — the main way in and out, to the county line at the summit |
| SR 9 | Santa Cruz up the San Lorenzo through Felton and Ben Lomond to Boulder Creek |
| SR 129 | Watsonville east along the Pajaro to US 101 |
| SR 152 | Watsonville east to Hecker Pass and the Santa Clara line |
Caltrans District 5 also publishes this county’s highway cameras: twenty-six of them, twenty-three along SR 1 from the Pajaro to Emeline Avenue and three on SR 17, each with its postmile.
And on the Monterey board
District 5 again, and on this board SR 1 is the county: from the Pajaro past Moss Landing and Marina, through Monterey and Carmel, and then ninety miles of the Big Sur coast to Ragged Point at the San Luis Obispo line, with no other way through. The night the board was built the file carried six one-way sections between Carmel and Gorda and nothing fully closed — two bridge jobs and a slide with a temporary signal at Carmel, drainage work above Big Sur, and “Emergency Work” between postmiles 27.3 and 28.1, which is the Regent’s Slide one-way the road has carried since 2024. A one-way section on this road can mean a wait of twenty minutes or a closure overnight; the tile prints what Caltrans files, with its hours.
| Route | Runs |
|---|---|
| SR 1 | the coast highway: the Pajaro River past Moss Landing and Marina to Monterey, then Carmel and the whole Big Sur coast to Ragged Point at the San Luis Obispo line. Boxed to the county, so the Santa Cruz freeway and the San Luis Obispo coast stay off it |
| SR 68 | Monterey and Pacific Grove east past the airport to Salinas and US 101 — the Peninsula’s main way in |
| SR 156 | Castroville east to US 101 at Prunedale |
| SR 183 | Castroville south to Salinas |
The postmiles run south to north on SR 1 here. Caltrans counts each route from the south or west end of the county, so on this board postmile 0 is Ragged Point, Gorda is about 10, Big Sur village about 45, Carmel 72 and Moss Landing 96. A Big Sur reader told “one-way at 27.3” is being told about the road twenty miles south of the village, below Lucia. The cameras: Caltrans lists thirty in the county on this board’s roads — fourteen on SR 1 from the Pajaro to the Carmel River and sixteen on SR 68 — and none south of the Carmel River. Big Sur, Lucia and Gorda have a highway and no camera on it, and the tile says so and names the nearest.
And on the San Francisco board
District 4, and the city’s state highways are freeways. Caltrans files about 270 lane-closure records for the county on a typical night, nearly all of them overnight lane work on I-280, I-80 and US 101; the tile folds the nightly repeats and shows what is actually closed. Five corridors, each cut at the county line so the San Mateo board’s SR 1 and Skyline stay off this one and vice versa.
| Route | Runs |
|---|---|
| SR 1 | SR 1, 19th Avenue and Park Presidio from the Daly City line to the Golden Gate Bridge — the Sunset’s way to the Gate |
| US 101 | US 101 through the city: the Golden Gate Bridge approach, Doyle Drive, Van Ness and the Central Freeway down the Bayshore to the county line |
| I-80 | I-80, the Bay Bridge — Treasure Island’s only road — from the Embarcadero across to the Oakland toll plaza, so the whole span is on the tile |
| I-280 | I-280 from the Embarcadero and Mission Bay past the Bayview to the Daly City line |
| SR 35 | SR 35, Skyline Boulevard past Lake Merced and Fort Funston to the Daly City line |
Caltrans lists thirty-three cameras in the county — on I-280, US 101 and the Bay Bridge, and one on 19th Avenue — each with its postmile. Treasure Island’s are the bridge’s.
And on the San Luis Obispo board
District 5 again, and the road splits at Pismo Beach. Caltrans filed forty-four lane-closure records for the county on the night this was written: fourteen on US 101, ten on SR 46, eight on SR 1, the rest on SR 227, SR 41 and SR 166. The tile reads four corridors: SR 1 down the north county to Pismo, US 101 from the Santa Maria River up through the Five Cities and San Luis Obispo to the top of the Cuesta Grade, and the two roads over the hills, SR 46 from Cambria and SR 41 from Morro Bay. SR 227 and SR 166 are left off. The postmiles on SR 1 in this county run south to north, Pismo 0 to Ragged Point about 74, so a Cambria reader told “one-way at 58” is being told about the road north of San Simeon.
| Route | Runs |
|---|---|
| SR 1 | SR 1, the coast highway: Ragged Point past San Simeon, Cambria and Cayucos to Morro Bay, then Los Osos Valley Road and on to Pismo Beach, where it joins US 101 |
| US 101 | US 101, from the Santa Maria River through the Five Cities and San Luis Obispo to the top of the Cuesta Grade — the south county’s road and the way in from the north |
| SR 46 | SR 46, Cambria east over the Santa Lucias to Paso Robles and US 101 — the north county’s way in |
| SR 41 | SR 41, Morro Bay east to Atascadero and US 101 |
Caltrans lists fifty-four cameras in the county and forty-eight of them are on US 101; three are on SR 46 over the hill and three on the whole of SR 1 — at Foothill Boulevard in San Luis Obispo, south of SR 46 above Cayucos, and at Hearst Castle. The camera tile on the San Simeon, Cambria and Cayucos pages says how far off the nearest one is, because on that road the gap is the fact.
And on the Santa Barbara board
District 5 again, and US 101 is the board. Caltrans filed eighty-nine lane-closure records for the county on the day this was written: thirty-three on US 101, fourteen on SR 246, thirteen each on SR 1 and SR 192, the rest on SR 154, SR 135, SR 166 and SR 150. The tile reads four corridors: US 101 from Gaviota Pass to the Ventura line, the one road every town on the south coast has; SR 154 over San Marcos Pass, the city’s way to the valley; SR 192, the foothill road from the city through Montecito to Carpinteria, which is the way round when 101 shuts at Montecito, as it did for a fortnight in the January 2018 debris flow; and SR 1 west from Gaviota to Lompoc, Gaviota’s other road. SR 246, 135, 166 and 150 are the valleys’ and are left off.
| Route | Runs |
|---|---|
| US 101 | US 101, the coast: Gaviota Pass past Goleta and Santa Barbara to Montecito, Summerland, Carpinteria and the Ventura line at Rincon |
| SR 154 | SR 154, San Marcos Pass from Santa Barbara over to the Santa Ynez Valley |
| SR 192 | SR 192, the foothill road from Santa Barbara through Montecito to Carpinteria |
| SR 1 | SR 1, Gaviota west through Las Cruces to Lompoc |
Caltrans lists forty-one cameras in the county and thirty-four of them are on US 101; the rest are in the valleys and at Lompoc, and one is on SR 154 at the foot of the pass. There is none on SR 192.
And on the Ventura board
District 7, Caltrans’ Los Angeles district, and the first board on it. Its file is ten times the size of District 5’s — 4,429 records the day this was written, 334 of them in Ventura County and 243 of those on US 101, nearly all overnight freeway lane work, which the tile folds so a closed road is not buried under a lane closed at three in the morning. The tile reads four corridors: US 101 from the Rincon to the top of the Conejo Grade, the board’s road; SR 1 from Oxnard through Port Hueneme past Point Mugu to the Los Angeles line, the shore’s own; SR 33 up the Ventura River to Ojai, which is the way out when 101 shuts at the Rincon; and SR 126 up the Santa Clara River to Santa Paula. SR 118, 23 and 150 are the inland valleys’ and are left off.
| Route | Runs |
|---|---|
| US 101 | US 101, the coast: the Rincon past Ventura and Oxnard to Camarillo and the top of the Conejo Grade |
| SR 1 | SR 1, Oxnard through Port Hueneme and past Point Mugu to the Los Angeles line |
| SR 33 | SR 33, Ventura up the river to Ojai |
| SR 126 | SR 126, Ventura up the Santa Clara River to Santa Paula and Fillmore |
Caltrans lists eighteen cameras in the county, and one of them is on this coast: US 101 at Victoria Avenue in Ventura. The rest are on SR 23 and SR 118 in Thousand Oaks, Moorpark and Simi Valley, and five were out of service when the list was read. The camera tile on the Rincon coast, Oxnard, the harbour and Port Hueneme says how far off that one is.
And on the Los Angeles board
District 7 again, and this is its own county: 4,068 lane-closure records in Los Angeles County the day this was written — 709 on SR 14, 567 on I-405, 559 on I-5, 503 on I-105, 456 on US 101 — and only 54 on SR 1, the road the whole shore lives on. The tile reads five corridors, each boxed to the coast so the basin’s freeways stay off it: SR 1, Pacific Coast Highway, from the Ventura line through Malibu and Santa Monica and on through the South Bay to Long Beach; I-10 from Santa Monica to the 405, Santa Monica’s way in; I-405 from the Westside through the South Bay to Long Beach; I-110 down to San Pedro; and I-710 down to Long Beach and the port. The canyon roads over the Santa Monica Mountains — Topanga, Malibu Canyon, Kanan — are county roads, not state highways, and are not in Caltrans’ file. Avalon has no state highway at all, and gets no road tile.
| Route | Runs |
|---|---|
| SR 1 | SR 1, Pacific Coast Highway: the Ventura line through Malibu and Santa Monica, then through the South Bay to Long Beach |
| I-10 | I-10 from Santa Monica to the 405 |
| I-405 | I-405 from the Westside through the South Bay to Long Beach |
| I-110 | I-110, the Harbor Freeway, down to San Pedro |
| I-710 | I-710 down to Long Beach and the port |
Caltrans lists 562 cameras in the county, and the board carries the 232 on those five roads within reach of a row: 31 on SR 1 (most of them along Malibu), 44 on I-10, 60 on I-405, 73 on I-110 and 24 on I-710; 24 of them were out of service when the list was read, and the tile says how many. Every row but Avalon has a working camera within four miles, except Zuma, whose nearest working one is SR 1 at John Tyler Drive, seven miles east.
And on the Orange board
District 12, Caltrans’ Orange County district, and the first board on it: 758 lane-closure records the day this was written — 204 on SR 55, 184 on SR 91, 122 on I-405, 101 on I-5, 42 on SR 1. The tile reads seven corridors, each boxed to the coast: SR 1 from Seal Beach to Dana Point, where it ends at I-5; I-405 from Seal Beach to Irvine; SR 55 down to Newport, stopped at the 405 so the county’s freeway work north of it stays off; SR 133, Laguna Canyon Road, Laguna Beach’s one road in; SR 73 behind Laguna; I-5 through Dana Point and San Clemente, which is San Clemente’s only state highway; and SR 39, Beach Boulevard, down to Huntington Beach.
| Route | Runs |
|---|---|
| SR 1 | SR 1, Pacific Coast Highway: Seal Beach through Huntington, Newport and Laguna to Dana Point |
| I-405 | I-405 from Seal Beach to Irvine |
| SR 55 | SR 55, the Costa Mesa Freeway, down to Newport |
| SR 133 | SR 133, Laguna Canyon Road, into Laguna Beach |
| SR 73 | SR 73 behind Laguna, Costa Mesa to San Juan Capistrano |
| I-5 | I-5 through Dana Point and San Clemente to the San Diego line |
| SR 39 | SR 39, Beach Boulevard, down to Huntington Beach |
Caltrans lists 419 cameras in the district, and the board carries the 206 on those roads within reach of a row: 34 on SR 1, every one of them on PCH between Laguna Beach and Dana Point, 32 on I-405, 25 on SR 55, 35 on SR 73, 7 on SR 133, 70 on I-5 and 3 on SR 39; ten were out of service when the list was read. Every row has a working camera within five miles. From Seal Beach to Corona del Mar the nearest are on the freeways: Caltrans has no camera on PCH north of Laguna.
And on the San Diego board
District 11, Caltrans’ San Diego and Imperial district: 480 lane-closure records the day this was written — 208 on I-805, 81 on I-5, 42 on I-15, 40 on SR 78 — and none on SR 1, because SR 1 ends at Dana Point. This coast’s road is I-5. The tile reads five corridors: I-5 from the Orange line through Camp Pendleton, Oceanside and the north county beaches, past La Jolla and downtown to San Ysidro; SR 75, the Coronado bridge and the Silver Strand to Imperial Beach; SR 78 and SR 76, Oceanside’s roads inland, boxed to the coast end; and I-8 from Ocean Beach to the 805. I-805, I-15, SR 94 and SR 52 are the county’s inland freeways and are left off.
| Route | Runs |
|---|---|
| I-5 | I-5 from the Orange line through Oceanside, the north county beaches and La Jolla to San Ysidro |
| SR 75 | SR 75, the Coronado bridge and the Silver Strand to Imperial Beach |
| SR 78 | SR 78 from Oceanside inland to Vista |
| SR 76 | SR 76 from Oceanside up the San Luis Rey valley |
| I-8 | I-8 from Ocean Beach to the 805 |
Caltrans lists 324 cameras in the district, and the board carries the 148 on those roads within reach of a row: 106 on I-5, 25 on I-8, 16 on SR 76 and one on SR 78, all in service when the list was read. There is no camera on SR 75, so Coronado’s tile says so; every other row has a working camera on I-5 within six miles.
And on the East Bay board
District 4 again, from the other side of the bay. The tile reads nine corridors, each boxed to the shore so the inland valleys’ freeways stay off it: I-80 from the Bay Bridge to the Carquinez Bridge, I-580 from the Richmond-San Rafael Bridge to the MacArthur Maze, I-880 and I-980 through Oakland, SR 260 through the tubes to Alameda, SR 61 through Alameda, I-680 over the Benicia Bridge, SR 4 along the strait, and SR 160 over the Antioch Bridge. The canyon roads over the hills (SR 24, SR 13) are left off.
| Route | Runs |
|---|---|
| I-80 | I-80 from the Bay Bridge toll plaza through Emeryville, Berkeley and Richmond to the Carquinez Bridge |
| I-580 | I-580 from the Richmond-San Rafael Bridge through Richmond to the MacArthur Maze |
| I-880 | I-880 from the Maze through Oakland past the airport to San Leandro |
| I-980 | I-980 through downtown Oakland |
| SR 260 | SR 260, the Posey and Webster tubes under the estuary to Alameda |
| SR 61 | SR 61 through Alameda to San Leandro |
| I-680 | I-680 over the Benicia Bridge at Martinez |
| SR 4 | SR 4 along the strait from Hercules through Martinez and Pittsburg to Antioch |
| SR 160 | SR 160, the Antioch Bridge |
The board carries the 357 District 4 cameras on those roads within reach of a row, and every row has a working one within two miles. Alameda’s nearest are on I-880 across the estuary: Caltrans has only two cameras on SR 260 and none on SR 61.
And on the North Bay board
District 4 again, on the far shore of San Pablo Bay and up into the Delta. The tile reads nine corridors, boxed to the rows: I-80 through Vallejo to Fairfield, I-780 between Vallejo and Benicia, I-680 from the Benicia Bridge to Cordelia, SR 37 out of Vallejo, SR 29 up to Napa, SR 121 and SR 221 at Napa, SR 12 from Jameson Canyon to the Rio Vista Bridge, and SR 84 along the river at Rio Vista.
| Route | Runs |
|---|---|
| I-80 | I-80 from the Carquinez Bridge through Vallejo to Fairfield |
| I-780 | I-780 between Vallejo and Benicia |
| I-680 | I-680 from the Benicia Bridge to Cordelia |
| SR 37 | SR 37 from Vallejo toward Sears Point |
| SR 29 | SR 29 from Vallejo through American Canyon to Napa |
| SR 121 | SR 121 at Napa |
| SR 221 | SR 221 into Napa |
| SR 12 | SR 12 from Jameson Canyon through Fairfield and Suisun City to the Rio Vista Bridge |
| SR 84 | SR 84 along the river at Rio Vista |
The board carries the 185 District 4 cameras on those roads within reach of a row, most of them on I-80 and I-680. There is no camera on SR 12 or SR 84 near Rio Vista: the nearest on its roads is twenty-five miles off, and Rio Vista’s tile says so. Vallejo, Benicia and Suisun City each have a working camera within two miles, and Napa within three.
Roads that are not the state’s are in no Caltrans feed at all, on any board. On the north coast, Mattole Road at Petrolia and Shelter Cove Road are county roads: when one of those is out, the tile will show an open 101 and nothing else, and the county is who knows — Humboldt County Public Works, or Del Norte’s.
This tile is not a warning system, and it is not everything. It repeats planned and approved roadwork. A crash, a slide or a tree down an hour ago is not in it, and an empty tile never means the road is clear — only that no approved closure is on it.
Planned work, not tonight’s crash
Caltrans runs a Lane Closure System. It publishes the closures that have been approved for the coming week and reissues the whole list every few minutes, free and without a key. That list is what the tile reads.
So it answers “will 101 be one-way at Klamath tomorrow morning”. It does not answer “why is 101 stopped right now”. Unplanned things — a collision, a slide, a vehicle fire — are the California Highway Patrol’s, and they appear on the CHP traffic incident page while they are happening. The tile does not read that, so when the road is shut and the tile is quiet, CHP is where to look.
Four words, and only one of them shuts the road
Every entry Caltrans publishes carries one of four descriptions. They are not degrees of the same thing: three of them mean the road is open and you will wait.
| Caltrans says | On the ground |
|---|---|
| Full | the road is shut. On 101 or 199 that is a long way round, or no way round at all. |
| One-Way Traffic | one lane, both directions, a flagger or a signal. The road is open. You wait. |
| Alternating Lanes | the same idea where there are more lanes to give and take. |
| Lane | a lane or a shoulder is out. Usually you will not notice. |
Only Full closes the road on this board, and only when the crew is actually on scene. Caltrans states the wait itself for the others, in minutes, and the tile prints that number rather than inventing one.
Why the work says it started in March
Long-running control is normal here in a way it is not on flatter coasts. Emergency work after a slide, a bridge being rebuilt a half at a time, a wall going in above the road — these run for months, and a one-way signal can stand on the same mile of 101, 199 or SR 1 for a year.
The tile says how long, because “one-way since May” is a different fact from “one-way since this morning”. The first is a thing to allow twenty minutes for. The second is news.
Postmiles, not mile markers
California measures each route by postmile, counted from the county line and starting again at every county, which is why 101 runs to postmile 100-odd in Humboldt and then restarts in Del Norte. The little white paddle at the roadside is a postmile marker, and the number on it is the one Caltrans is quoting.
A letter in front of it — R, T, M — belongs to the number and is not a typo. It marks a stretch that was realigned, so the mileage still runs in order. The tile keeps the letter for that reason.
County roads are a different office entirely
Caltrans looks after the state highways and nothing else. Every other road on every board belongs to a county or a city, none of them is in the feed, and none of them will ever appear on this tile. On the north coast that means Mattole Road, Shelter Cove Road, Bald Hills Road and the roads out to the Lost Coast.
They close, though, and in winter they close often. The two north coast counties:
- Humboldt County posts the condition of its own roads on the county website, as notices rather than as a feed: humboldtgov.org road conditions.
- Del Norte County keeps a traffic alerts page, and the Roads Division answers the phone on (707) 464-7238.
Elsewhere on this coast the same holds: a county or city road is the county’s or the city’s, and its public works department is who knows. If a county road matters to your day, neither this board nor Caltrans is the place to look. Ring the county.
Chains
Caltrans publishes chain requirements, and this tile does not read them. On the north coast boards they are rare and inland — 299 over the mountains, 36 east of Bridgeville — and they can appear in a few hours. Before a winter drive inland, check QuickMap or ring the highway line.
The highway cameras
The Highway cameras tile shows up to three of Caltrans’s District 1, 4, 5, 7, 11 and 12 cameras on your town’s own highways, nearest first, within 25 miles. Each row names the road, the postmile, and how far from town the camera is and which way.
The picture has its own clock. Caltrans prints the date and time in a grey bar on every frame. That is the time of the picture: read it there. The date on the tile is a different thing — when this site last read Caltrans’s list of cameras, which changes only when Caltrans adds or retires one.
The picture comes straight from Caltrans. Your browser fetches it from cwwp2.dot.ca.gov; this site never handles it. If a frame will not load, the tile says Caltrans is not serving that camera’s picture, and QuickMap is the place to look.
Postmiles, not mileposts. Caltrans publishes both for every camera and they are different numbers — the milepost runs from the bottom of the state, the postmile restarts at each county line. The postmile is the number on the white paddle beside the road, so that is the one the tile prints, letter and all, the same as the closures above.
Out of service. A camera Caltrans lists as out of service never takes one of the three places; the tile counts them under the list instead. A dead Caltrans camera serves a “Down for Construction” card rather than a stale picture, so a frame that looks frozen is one to check against its own clock.
No camera. Where Caltrans has no camera on your highway within 25 miles, the tile says so and names the nearest one on that road, with its distance. That is the one place on this site an absence is spelled out, because what is missing is Caltrans’s eye on a road you are about to drive. Most of the Sonoma and Marin coast lands here.
The list of cameras was read from Caltrans’s camera status files for District 1, District 4, District 5, District 7, District 11 and District 12 on September 24, 2026, and is re-read twice a year.
If you are about to drive it
- Caltrans highway information, any road in the state, recorded and live: 1-800-427-7623.
- QuickMap for closures, chains, cameras and the rest: quickmap.dot.ca.gov.
- CHP for what is happening right now: cad.chp.ca.gov.
- Your county for anything that is not a state highway.
And on the north coast, if the road you are asking about is Last Chance Grade — the stretch of 101 between Crescent City and Klamath that everybody there asks about — it is a state highway, so when work or a slide closes it, it will be on this tile and on QuickMap both.
Where this comes from
- Caltrans District 1 (Del Norte, Humboldt, Mendocino, Lake) — dot.ca.gov district 1
- Caltrans Districts 4, 5, 7, 11 and 12, the other boards’ — district 4, district 5, district 7, district 11, district 12
- Caltrans road information and the highway line — roads.dot.ca.gov
- Caltrans QuickMap — quickmap.dot.ca.gov
- CHP traffic incident information — cad.chp.ca.gov
- Humboldt County road conditions (north coast boards) — humboldtgov.org
- Del Norte County traffic alerts (north coast boards) — co.del-norte.ca.us