Foothill Freeway facts for kids
Quick facts for kids
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Foothill Freeway | ||||
I-210 highlighted in red; SR 210 in purple
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Route information | ||||
Defined by S&HC § 510 | ||||
Maintained by Caltrans | ||||
Length | 85 mi (137 km)
Length includes the unconstructed portion of I-210.
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History | Route proposed 1933 Designated 210 in 1964 |
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Component highways |
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Major junctions | ||||
West end | ![]() |
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East end | ![]() |
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Location | ||||
Counties: | Los Angeles, San Bernardino | |||
Highway system | ||||
State highways in California(list • pre-1964) History • Unconstructed • Deleted • Freeway • Scenic
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The Foothill Freeway is a major highway in the Los Angeles metropolitan area in California. It stretches from the Sylmar area of Los Angeles all the way east to Redlands.
Part of this freeway is called Interstate 210 (I-210). This section runs from its start at I-5 to SR 57 in Glendora. The other part is known as State Route 210 (SR 210). It continues east from Glendora to its end at I-10. Legally, the whole road is known as Route 210.
The name "Foothill Freeway" comes from Foothill Boulevard and the San Gabriel Mountains. The freeway runs alongside these mountains for most of its journey. It connects the suburbs northeast of Los Angeles with the Inland Empire region. Over time, the Foothill Freeway has had different numbers. The I-210 route also changed, once including a part of what is now the Orange Freeway (SR 57). East of Pasadena, the Foothill Freeway follows, and sometimes replaced, the path of the old U.S. Route 66.
By 2007, the section between I-5 and SR 259 in San Bernardino met the high standards for Interstate Highways. However, the eastern part is still called a state route. This is because the section between SR 259 and I-10 does not fully meet those standards. In February 2020, work began to add two new lanes, one in each direction. This project will last three years. It covers the area from Sterling Avenue in San Bernardino to San Bernardino Avenue in Redlands.
Contents
Exploring the Foothill Freeway Route
I-210 starts where it meets the Golden State Freeway (I-5). This is near the Sylmar area of Los Angeles. From there, the freeway goes southeast through the San Fernando Valley and the Crescenta Valley.
After leaving Los Angeles, it enters northern Glendale. Then it goes into La Cañada Flintridge. Here, it meets the Glendale Freeway and Angeles Crest Highway (SR 2). The freeway then turns south towards the Ventura Freeway (SR 134) in Pasadena.
At this meeting point, the Foothill Freeway changes direction. It becomes an east-west highway. The main lanes of I-210 from the north become an unfinished part of I-710. Meanwhile, the lanes from the Ventura Freeway become I-210. After crossing the northern end of I-605, I-210 continues east. It reaches the Orange Freeway (SR 57) in Glendora. East of this interchange, until its end at I-10 in Redlands, Route 210 is signed as a state route.
Parts of the Metro A Line train run in the middle of the Foothill Freeway. This section goes from Pasadena to Arcadia. It serves three train stations: Lake Avenue, Allen Avenue, and Sierra Madre Villa.
SR 210 has two different parts. The western part is a newer freeway. It begins at the east end of I-210 near San Dimas. SR 210 goes eastward, running next to Highland Avenue. It passes through Fontana. It crosses I-15, a key road between Southern California and Nevada. This is about 10 miles (16 km) before it meets I-215 in San Bernardino.
The section east of I-215 used to be SR 30. This part goes east to meet I-215, SR 259, SR 18, and SR 330 in Highland. SR 210 then turns south. It ends where it joins I-10 in Redlands.
Route 210 is part of California's Freeway and Expressway System. It is also part of the National Highway System. This system includes highways important for the country's economy, defense, and travel. The Federal Highway Administration decides which roads are part of this system. Route 210 could be a State Scenic Highway. However, the California Department of Transportation (CalTrans) has not officially named it one. In 1991, Senate Concurrent Resolution 29 named Route 210, from Route 5 to Route 10 in Redlands, the Foothill Freeway.
The Glendora Curve Explained
The Glendora Curve was a common name for the interchange between SR 57 and the Foothill Freeway, I-210. The "curve" was where the I-210 freeway made a sharp, almost 90-degree turn south in Glendora.
Before 2002, this curve was entirely part of I-210. The freeway continued south to its old eastern end at the Kellogg Interchange. There, it met the Chino Valley Freeway (SR 71), the San Bernardino Freeway (I-10), and SR 57.
When I-210 was extended eastward from the Glendora Curve, the part of I-210 south of the curve became SR 57. After this change, the name Glendora Curve was not used as much anymore.
History of the Foothill Freeway
Construction on the Foothill Freeway began in 1958. The first part opened in 1966. It went from the east end of Foothill Boulevard in La Cañada Flintridge to Canada Avenue in Pasadena. This section was first called SR 118. Later construction bypassed this section.
Building the First Sections
The section going northwest from Pasadena to I-5 in Sylmar was built in stages. This happened between 1971 and 1977. The first part to open was in July 1972. It was between Ocean View Boulevard and Lowell Avenue in La Crescenta. In November, the section between Berkshire Avenue and Ocean View in La Cañada Flintridge opened.
The freeway section in Sylmar, California, was supposed to open first. This was between I-5 and Maclay Avenue. But it was damaged by the 1971 Sylmar Earthquake. Its opening was delayed until repairs finished in 1973. In Pasadena, California, a bridge over the Arroyo Seco collapsed during construction. This happened on October 17, 1972, and six workers died. Because of this, the northbound section through Pasadena did not fully open until 1974.
The last part in the San Fernando Valley to be finished was between Highway 118 and Lowell Avenue. This section was mostly done by 1976. However, the part crossing the Tujunga Wash was not fully completed until 1981. From 1976 to 1980, the unfinished part of I-210 was rented by MGM Television. It was used for filming the TV show CHiPs.
In 1968, a historic train depot was moved. The Atchison, Topeka and Santa Fe Railway depot at Santa Anita was built in 1890. It was moved to the Los Angeles County Arboretum and Botanic Garden. This made way for a part of the freeway through Arcadia. Building the freeway through Pasadena and Arcadia also changed the railroad's main line. It was moved to the middle of the freeway. The old tracks in Pasadena became an industrial spur.
The "Pasadena" section, from SR 134 to Rosemead Boulevard, was finished in 1976. The section from Arcadia, California to the Kellogg Interchange with I-10 at Pomona was finished earlier, in 1971. The part between the Kellogg Interchange and Glendora is no longer I-210. In 2003, this piece was renumbered as part of SR 57, known as the Orange Freeway.
Freeway Extensions and Changes
In the 1990s, Caltrans started building extensions to the freeway. These extensions went from Glendora east to the old I-215/SR 30 interchange in San Bernardino. In 2003, a 20-mile (32 km) section from Glendora to Fontana was finished. The part going south from Glendora was renumbered SR 57. The remaining section east of I-15, between Fontana and I-215, opened on July 24, 2007.
Caltrans has asked the American Association of State Highway and Transportation Officials (AASHTO) to rename the entire Foothill Freeway as I-210. AASHTO is the group that oversees the numbering of the Interstate Highway System. When the new freeway section west of I-215 was completed, SR 30 from I-215 to I-10 in Redlands was renamed SR 210. In 2003, the old part of I-210 that is now SR 57 was changed. This cut off I-210 from its parent route, I-10. If the entire Route 210 becomes an Interstate in the future, I-210 will connect to I-10 again, but much farther east in Redlands.
The western freeway section was planned since the 1970s and finished in 2002. It replaced an older road section. This old road started with Base Line Road in La Verne. It went east into Upland. In Upland, it became 16th Street, then Mountain Avenue, then 19th Street. It continued into Rancho Cucamonga. After Haven Avenue, 19th Street curved north and became Highland Avenue. Highland Avenue still exists in some places, but the freeway now covers parts of it.
Highland Avenue leaves the original SR 30 path at Etiwanda Avenue. It curves south and ends at East Avenue, the border of Rancho Cucamonga and Fontana. Highland Avenue starts again at Cherry Avenue, east of I-15. It continues east, becoming W. Easton Avenue at Alder Avenue. Soon after, it makes a sharp left turn at Riverside Avenue, crossing over the freeway. It becomes Highland Avenue again. From here, it leaves Rialto and goes into San Bernardino. It crosses under SR 210, I-215, and SR 259 before entering Highland. In Highland, the original SR 30 crosses under the 210 one last time. It ends as it crosses over SR 330. Some maps still show part of this route as SR 30.
The Story of State Route 30
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Location: | Glendora–Redlands |
Existed: | 1933–2007 |
State Route 30 (SR 30) was the old name for parts of SR 210 and SR 330. SR 30 ran from its interchange with I-210 in Glendora east to SR 18 at Big Bear Lake. The easternmost part of SR 30 became SR 330 in 1972. After that, SR 30 was routed south to I-10 in Redlands. In 1999, all of SR 30 from the Glendora Curve to Redlands became part of Route 210.
SR 30 became a state route in 1933. It was part of Legislative Route 190. This was an unmarked highway. It ran from LRN 9 (old US 66) near San Dimas to LRN 26 (SR 38) near Redlands. It also ran from LRN 26 near Redlands to LRN 43 near Big Bear Lake, which later became part of SR 38.
When California routes were renumbered, LRN 190 was split. The western part, between I-210 in San Dimas and Highland, became SR 30. The eastern part, between SR 38 in Redlands and Highland, was combined with LRN 207 (now SR 330) to form SR 106. In 1972, the northern part of SR 106, between SR 30 and SR 18, was renumbered SR 330. The southern part, between SR 30 and I-10, was combined with SR 30.
Freeway construction for SR 30 started in 1968. It built the freeway between SR 259 and Cedar Street in San Bernardino. Construction continued east in 1971. This brought the freeway just west of SR 330. Construction did not start again until 1989. This extended the freeway west to I-215. The last part of construction began in 1992. It connected the route south to I-10.
In 1968, the state asked for SR 30 to become part of the Interstate system, but this was not approved. The next effort began in 1998. The state decided to close the 25-mile (40 km) gap between I-210 and SR 30. It also decided to number the new freeway as SR 210. This was in preparation for the route becoming an Interstate. Also, when the new freeway was close to the existing route, the entire route would be renumbered SR 210. In addition, the short section of the Orange Freeway, which was I-210, would be renumbered SR 57. This would match the number used for the rest of that freeway. Construction started on the eastern end from Foothill Boulevard (exit 47). It slowly moved east. In 2007, the main freeway section was completed. This ended the existence of SR 30.
State Route 30 Business Route
Location: | Rialto–Highland |
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Existed: | 1964–2007 |
State Route 30 Business (SR 30 Bus.) was a special route of SR 30. It existed from 1964 to 2007. It followed Highland Avenue from Rialto to Highland. Its main job was to guide traffic from the Foothill Freeway. It also connected downtown Rialto to Downtown San Bernardino by street. Some old, faded signs for this business route can still be seen at Waterman Avenue and Highland Avenue.
Completing the I-215 Interchange
The final step of the Foothill Freeway project was finishing the interchange with I-215 (exit 74). When the main Foothill Freeway was completed in 2007, exit 74 only had four of its six ramps built. It was missing ramps for traffic going from SR 210 eastbound to I-215 southbound. It also lacked ramps from I-215 northbound to SR 210 westbound.
Plans for these missing ramps had to be changed. This was to make sure they could withstand potential ground movement during an earthquake. This part of the project was separated from the main 210 project. This was done to avoid delaying the rest of the freeway. Finishing exit 74 was also linked to making I-215 wider in that area.
The ramp from northbound I-215 to westbound SR 210 opened on December 22, 2011. The ramp from eastbound SR 210 to southbound I-215 opened on July 23, 2012. These openings finally completed the interchange.
Exit list
County | Location | mi | km | Exit | Destinations | Notes |
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Los Angeles | Los Angeles | 0.00 | 0.00 | 1A | ![]() |
Western terminus of I-210; I-5 exit 161A |
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Westbound exit and eastbound entrance | ||||
1B | ![]() |
Westbound exit and eastbound entrance; I-5 exit 161B | ||||
0.84 | 1.35 | 1C | Yarnell Street | Signed as exit 1 eastbound | ||
1.92 | 3.09 | 2 | Roxford Street – Sylmar | |||
3.28 | 5.28 | 3 | Polk Street | |||
4.11 | 6.61 | 4 | Hubbard Street | |||
4.94 | 7.95 | 5 | Maclay Street – San Fernando | |||
5.91 | 9.51 | 6A | ![]() |
Signed as exit 6B westbound; SR 118 exits 46A-B | ||
6.00 | 9.66 | 6B | Paxton Street | Signed as exit 6A westbound | ||
7.82 | 12.59 | 8 | Osborne Street / Foothill Boulevard | |||
9.43 | 15.18 | 9 | Wheatland Avenue – Lake View Terrace | |||
11.08 | Sunland Boulevard – Sunland, Tujunga | |||||
14.17 | 22.80 | 14 | La Tuna Canyon Road | |||
Glendale | 15.62 | 25.14 | 16 | Lowell Avenue – Tujunga | ||
16.77 | 26.99 | 17A | Pennsylvania Avenue – La Crescenta | Signed as exit 17 eastbound | ||
La Crescenta-Montrose | 17.38 | 27.97 | 17B | La Crescenta Avenue – La Crescenta | Westbound exit and eastbound entrance | |
18.22 | 29.32 | 18 | Ocean View Boulevard – Montrose | |||
La Cañada Flintridge | 18.88 | 30.38 | 19 | ![]() |
Western end of SR 2 concurrency; SR 2 north exits 21A-B | |
19.88 | 31.99 | 20 | ![]() |
Eastern end of SR 2 concurrency | ||
20.60 | 33.15 | 21 | Gould Avenue | Eastbound exit and westbound entrance | ||
Foothill Boulevard | Westbound exit and eastbound entrance | |||||
21.53 | 34.65 | 22A | Berkshire Avenue / Oak Grove Drive | |||
Pasadena | 22.49 | 36.19 | 22B | Arroyo Boulevard / Windsor Avenue | ||
23.19 | 37.32 | 23 | Lincoln Avenue / Washington Boulevard | |||
24.06 | 38.72 | 24 | Seco Street / Mountain Street | |||
24.96 | 40.17 | 25A | Colorado Boulevard / Del Mar Boulevard / California Boulevard (SR 710) – Pasadena | Eastbound left exit and westbound left entrance | ||
25B | ![]() |
Eastbound exit and westbound entrance; SR 134 exit 13B | ||||
25A | Fair Oaks Avenue south | Westbound exit and eastbound entrance | ||||
25B | Fair Oaks Avenue north / Marengo Avenue | Westbound exit and eastbound entrance | ||||
26A | ![]() ![]() |
Westbound exit and eastbound entrance; eastern terminus of SR 134/Ventura Freeway | ||||
26.33 | 42.37 | 26 | Lake Avenue | Signed as exit 26B westbound | ||
26.94 | 43.36 | 27A | Hill Avenue | Signed as exit 27 eastbound | ||
27.41 | 44.11 | 27B | Allen Avenue | Westbound exit and eastbound entrance | ||
28.25 | 45.46 | 28 | Altadena Drive / Sierra Madre Boulevard | Eastbound exit and westbound entrance | ||
28.68 | 46.16 | 29A | San Gabriel Boulevard | |||
29.29 | 47.14 | 29B | Madre Street | |||
Pasadena–Arcadia line | 29.80 | 47.96 | 30 | ![]() |
Signed as exits 30A (south) and 30B (north) eastbound | |
Arcadia | 30.82 | 49.60 | 31 | Baldwin Avenue – Sierra Madre | ||
31.88 | 51.31 | 32 | Santa Anita Avenue | |||
Monrovia | 32.89 | 52.93 | 33 | Huntington Drive | ||
33.91 | 54.57 | 34 | Myrtle Avenue | |||
Monrovia–Duarte line | 34.74 | 55.91 | 35A | Mountain Avenue | ||
Duarte | 35.24 | 56.71 | 35B | Buena Vista Street | ||
Irwindale | 36.41– 36.43 |
58.60– 58.63 |
36A-B | ![]() |
Signed as exit 36A (I-605) and 36B (Mount Olive Drive) | |
37.86 | 60.93 | 38 | Irwindale Avenue | |||
Azusa | 38.96 | 62.70 | 39 | Vernon Avenue | ||
39.60 | 63.73 | 40 | ![]() |
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40.60 | 65.34 | 41 | Citrus Avenue – Covina | |||
Glendora | 41.59 | 66.93 | 42 | Grand Avenue | ||
43.16 | 69.46 | 43 | Sunflower Avenue | |||
44.20 | 71.13 | 44 | Lone Hill Avenue | |||
44.90 | 72.26 | 45 | ![]() |
Glendora Curve; eastern end of I-210 and western end of SR 210; SR 57 is former I-210 east; SR 57 exits 25B-C | ||
San Dimas | 45.48 | 73.19 | 46 | San Dimas Avenue | ||
La Verne | 46.66 | 75.09 | 47 | ![]() |
Former US 66 | |
48.06 | 77.35 | 48 | Fruit Street | |||
Claremont | 49.57 | 79.78 | 50 | Towne Avenue | ||
51.91 | 83.54 | 52 | Base Line Road | Former SR 30 | ||
San Bernardino | Upland | 53.65 | 86.34 | 54 | Mountain Avenue – Mount Baldy | |
55.64 | 89.54 | 56 | Campus Avenue | |||
Rancho Cucamonga | 56.75 | 91.33 | 57 | Carnelian Street | ||
58.05 | 93.42 | 58 | Archibald Avenue | |||
59.06 | 95.05 | 59 | Haven Avenue | |||
60.06 | 96.66 | 60 | Milliken Avenue | |||
61.31 | 98.67 | 61 | Day Creek Boulevard | |||
Rancho Cucamonga–Fontana line | 63.80 | 102.68 | 64A | ![]() |
I-15 exits 115A-B | |
Fontana | 64.08 | 103.13 | 64B | Cherry Avenue | ||
♦ | Beech Avenue | HOV access only | ||||
66.08 | 106.35 | 66 | Citrus Avenue | |||
67.08 | 107.95 | 67 | Sierra Avenue | |||
Rialto | 68.18 | 109.73 | 68 | Alder Avenue | ||
69.54 | 111.91 | 70 | Ayala Drive | |||
71.15 | 114.50 | 71 | Riverside Avenue | |||
71.82 | 115.58 | 72 | Pepper Avenue | |||
San Bernardino | 72.84 | 117.22 | 73 | State Street / University Parkway | ||
74.02 | 119.12 | 74 | ![]() |
Westbound access to I-215 south is via exit 75B; former I-15E; I-215 exit 46C | ||
75.09 | 120.85 | 75A | H Street | Signed as exit 75 eastbound | ||
75.25 | 121.10 | 75B | ![]() |
Eastbound access is via exit 75; I-215 north exit 45A | ||
76.37 | 122.91 | 76 | ![]() |
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77.87 | 125.32 | 78 | Del Rosa Avenue | |||
78.88 | 126.95 | 79 | Highland Avenue | |||
80.81 | 130.05 | 81 | ![]() |
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Highland | 81.47 | 131.11 | 82 | Base Line Street | ||
82.38 | 132.58 | 83 | 5th Street / Greenspot Road | |||
Redlands | 84.49 | 135.97 | 84 | San Bernardino Avenue | ||
85.31 | 137.29 | 85 | ![]() |
Eastbound exit and westbound entrance; signed as exits 85A (west) and 85B (east); east end of SR 210; I-10 east exit 77B, west exit 77C | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi |
See also
In Spanish: Interestatal 210 y Ruta Estatal 210 para niños