Probably an urban freeway.
I have Joppa Road in Baltimore County, Maryland.
Parham Road and Laburnum Avenue in Henrico County, Virginia are quite busy.
Let's start with some actual numbers.
Storrow Drive in Boston at its junction with Mass Ave.: 89800 AADT (in 2006)
I don't know if this is the one-way or two-way total.
I also checked the Lowell Connector, but its AADT is lower.
Quote from: Roadgeekteen on September 23, 2017, 03:11:13 PM
Probably an urban freeway.
NJTP south of the PA Tpk connector? No route number is posted on the highway.
Maybe part of Florida's Turnpike in Orlando or south of West Palm Beach, though it has unposted route numbers for its two segments.
Pretty much any Manhattan main thoroughfare.
Clark St and Addison St in Chicago on Cubs Game Days =)
Here in San Jose, it'd likely be a toss-up among the following streets:
(a) Blossom Hill Road, a E-W thoroughfare across the southern end of town.
(b) Monterey Road (former CA 82), still the main way to get from downtown to the southeast side or Coyote Valley.
(c) North First Street: essentially Silicon Valley's "Main Street", with Cisco, Oracle, and others arrayed along its length.
(d) Coleman Avenue: the other main route from downtown SJ to the tech area north and NW of downtown.
If they weren't numbered as county routes (G2, G4, G6, G8, and G21), the regional expressways would certainly qualify.
Technically, Blossom Hill is County Road G10; but the reassurance shields disappeared long ago except for the west-end connection to CA 17 and CA 9 on Saratoga-Los Gatos Road and Los Gatos Blvd. (old CA 17). CSAA maps still show the route as posted, but the in-field experience indicates otherwise. Since the CA 85 freeway was opened a quarter-century ago, Blossom Hill is no longer the through route across southern SJ -- but the fact that it "hops" between shopping centers (and the only Dunkin Donuts in the area!) ensures a high traffic count.
Dallas North Tollway has numbers as high as 174,000.
Quote from: 1 on September 23, 2017, 03:43:29 PM
Let's start with some actual numbers.
Storrow Drive in Boston at its junction with Mass Ave.: 89800 AADT (in 2006)
I don't know if this is the one-way or two-way total.
I also checked the Lowell Connector, but its AADT is lower.
The irony is that they each were numbered, though the Lowell Connector being numbered was debatable and barely signed.
How are we defining "numbered"? Posted number or any numerical designation even if secret? If secret routes don't count as numbered, Metro New York takes the cake. Garden State Parkway (can't find counts but likely near 200K), Grand Central Parkway (highest non-forecast volumes slightly under 190K near I-495), and Southern State Parkway (forecast says 214K near Hempstead Lake) have ridiculous volumes.
FDR Drive its gotta be the busiest parkway that's not numbered in New York State.
Quote from: bing101 on September 24, 2017, 02:03:28 PM
FDR Drive its gotta be the busiest parkway that's not numbered in New York State.
Highest is 176K just south of the Triborough Bridge. Grand Central, Southern State, and Belt have higher sections.
Bell Road in the Phoenix area comes to mind past tense. Clovis Avenue in the Fresno area can get a little out of hand with traffic and speed.
It could also be Peña Boulevard in Denver, though less people use it now that the A Line is open.
Vasco Road its the busiest non Caltrans road in the San Francisco area. Originally there were talks that CA-84 was going to be on Vasco Road to bridge the gap between the Sacramento/Solano section of CA-84 with the Menlo Park to Livermore portion of CA-84.
2010 AADT for Toronto's Gardiner Expressway was 228,000. Taking typical growth rates for a freeway like that there it's probably around 262,000 today.
Prior to its designation as IL-390, the Elgin-O'Hare Expressway would've been eligible.
Other non-numbered (and not posted) routes would include:
North end of Lake Shore Drive between Foster Avenue (where US-41 leaves) to Hollywood Boulevard.
Stony Island Avenue between the Bishop Ford Freeway (I-94) and Cornell Drive.
22nd Street/Cermak Road east of Butterfield Road (IL-56).
Lower Wacker Drive.
The Parkway in NJ. It may be NJ 444, but does anyone other than us know it.
The ACE too, but I am only guessing that it has very busy traffic.
Quote from: cl94 on September 24, 2017, 01:48:52 PM
How are we defining "numbered"? Posted number or any numerical designation even if secret? If secret routes don't count as numbered, Metro New York takes the cake. Garden State Parkway (can't find counts but likely near 200K), Grand Central Parkway (highest non-forecast volumes slightly under 190K near I-495), and Southern State Parkway (forecast says 214K near Hempstead Lake) have ridiculous volumes.
Not signned.
Quote from: roadman65 on September 27, 2017, 12:45:48 PM
The Parkway in NJ. It may be NJ 444, but does anyone other than us know it.
The ACE too, but I am only guessing that it has very busy traffic.
ACE is only busy seasonally and during certain times of the week/day. The Parkway is pretty much always busy in places. By the way, is the GSP section in New York State numbered even internally?
Have we ever decided that the westernmost segment of the San Bernardino freeway is numbered? Most of the freeway is I-10, but I-10 is signed as joining I-5 to connect to the Santa Monica Freeway. So the section between I-5 Golden State Feeway and US 101 Santa Ana Freeway is unnumbered. Eastbound its signed as I-10, but it's not I-10; westbound it's signed as US 101, but it's not US 101. If this counts, this roadway has to be amongst the busiest as it connects the San Gabriel Valley with Downtown LA.
Oregon: Urban road I can't pinpoint or Delta Highway in Eugene: 50,000 AADT
NYC's Grand Central Parkway, FDR Drive, perhaps?
Busiest (local) non numbered route for me would have to be the intersection of University Ave. and Markham St. Both of them are very busy no matter where you are on the roads.