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| 8400 West Thatcher Avenue | |
| Former name | Pueblo Avenue |
|---|---|
| Part of |  IL 171 |
| Length | 15.70 miles (25.27 km) (southern segment) 1.50 miles (2.41 km) (northern segment) 17.20 miles (27.68 km) (total) |
| Location | Chicago |
| South end |  I-55 inSummit |
| North end | Church Street inNiles |
1st Avenue, also known asCumberland Avenue andThatcher Avenue for parts of its northern segment, is a north-south street inChicago and its western suburbs. It marks 8400 West in the Chicago address system, being located ten and one-half miles west ofState Street.
Its southern segment begins at an interchange withInterstate 55 (Stevenson Expressway) inSummit. At this point, it is called 1st Avenue and carriesIllinois Route 171. InLyons village, the road intersectsU.S. Route 34 (Ogden Avenue).[1] InNorth Riverside, 1st Avenue intersects22nd Street. InMaywood, it intersectsRoosevelt Road. 1st Avenue then intersectsInterstate 290 (Eisenhower Expressway) in Maywood. While still in Maywood, 1st Avenue intersectsMadison Street, crossing from the south side of themetropolitan area to the north side. Other streets that 1st Avenue intersects in Maywood areLake Street andChicago Avenue. InMelrose Park, 1st Avenue intersectsIllinois Route 64 (North Avenue). InRiver Grove, the road intersectsFullerton Avenue andGrand Avenue. Between these two streets, 1st Avenue ends and continues as Thatcher Avenue, which splits to the southeast and continues until Hawthorne Avenue inRiver Forest. While still in River Grove, Thatcher Avenue intersectsBelmont Avenue. It is at this point where Thatcher Avenue ends and Cumberland Avenue begins (the designation it will carry for the remainder of its routing). Next, Cumberland Avenue enters the city ofChicago and intersects the west end ofAddison Street. Then, it intersectsIllinois Route 19 (Irving Park Road). The next road Cumberland Avenue intersects isMontrose Avenue (at which it enters the village ofNorridge), followed byLawrence Avenue, and thenFoster Avenue, re-entering Chicago a block past. Next, the road has an interchange withInterstate 90 (Kennedy Expressway). At the northernmost portion of the interchange, Cumberland Avenue intersectsIllinois Route 72 (Higgins Road).Illinois Route 171 ends at this point as well. Further north intoPark Ridge, the road intersectsDevon Avenue andTouhy Avenue. The southern segment of Cumberland Avenue ends at Clifton Avenue and Cedar Street in Park Ridge.
Cumberland Avenue resumes at Oakton Street while still in Park Ridge. Continuing north intoNiles, the road intersectsU.S. Route 14 (Dempster Street). Cumberland Avenue continues north until ending at Church Street in Niles.
In the '20s, Chicago annexed the area of 84th Av and under the Brennan street name system (K-L-M-N-O-P) renamed it "Pueblo".[2] When Chicago replaced their street signs in the 1970s, they replaced the "Pueblo" signs with "Cumberland Av".
The entire route is inCook County.
| Location | mi[1] | km | Destinations | Notes | |||
|---|---|---|---|---|---|---|---|
| Summit | 0.0 | 0.0 |  IL 171 south –Willow Springs,Joliet | Continuation beyond I-55 | |||
| I-55 (Stevenson Expressway) –Chicago,St. Louis | Southern terminus, I-55 exit 282 | ||||||
| McCook | 0.7 | 1.1 |  Historic US 66 | Interchange, northbound exit and southbound entrance | |||
| 1.2 | 1.9 | 47th Street | Interchange | ||||
| Lyons | 1.9 | 3.1 |  US 34 (Ogden Avenue) | ||||
| Maywood | 5.9 | 9.5 |    I-290 (Eisenhower Expressway) /IL 110 (CKC) –Chicago | I-290 exit 20 | |||
| Melrose Park | 8.4 | 13.5 |  IL 64 (North Avenue) | ||||
| Chicago | 11.5 | 18.5 |  IL 19 (Irving Park Road) | ||||
| 13.7 | 22.0 |      I-90 Toll (Kennedy Expressway) toI-190 west –Chicago,O'Hare,Rockford | I-90 exit 79 | ||||
| Chicago–Park Ridge city line | 13.8 | 22.2 |   IL 72 (Higgins Road) /IL 171 ends | Northern end of IL 171 concurrency | |||
| Park Ridge | 15.7 | 25.3 | Clifton Avenue | Continues as Cedar Street | |||
| Gap in route | |||||||
| Niles | 15.7 | 25.3 | Oakton Street | ||||
| 16.7 | 26.9 |  US 14 (Dempster Street) | |||||
| 17.2 | 27.7 | Church Street | Northern terminus | ||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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