How many left exits or left entrances?

[Mergingtraffic]

How many are on the expressway system in your area?

[Quillz]

Nearest one to me that I can think of is Exit 89 or so for Cabrillo Blvd. near Santa Barbara.

[Dr Frankenstein]

Here are the ones I can think off the top of my head...

A-20 E -> A-15 N (Montréal, Turcot interchange)
A-15 S -> A-720 (same interchange)
A-20 E -> A-73 N (Québec, Pierre-Laporte Bridge)
A-20 W -> Notre-Dame St. (Montréal, reversed section of A-20)

A-40 E -> A-15 S (Montréal, Metro Blvd to Décarie Expy)

A-730 W -> A-30 E (brand new 30/730 interchange in St-Constant)

QC-138 E -> A-20 W (Montréal after Mercier Bridge)

ON-417 W -> ON-416 S (Ottawa)

[KEK Inc.]

Exit 165 (I-5) - Seneca St. in Seattle, WA.
There's quite a few HOV left exits, but I don't feel up to listing them all.

Left exits are quite rare in the Bay Area, but they're used on the Bay Bridge, and on I-280 SB in its Northern junction with US-101.  Also, there are a few HOV left exits.

[J N Winkler]

It would be interesting to differentiate between left exits at system (freeway-to-freeway) and service (freeway to surface road) interchanges.  In Wichita, there are no left exits at service interchanges, with the only movements that could plausibly be signed as left exits being at splits within system interchanges (I-135/I-235 "North Junction" and I-135/I-235 near the South Wichita interchange on the Kansas Turnpike).

Freeway splits are an ambiguous case because it is essentially an arbitrary decision to sign them as left exits and other conditions have to be met at an individual split before it can be considered to have the operational disadvantages ordinarily associated with left exits.  For example, in a TOTSO situation at a standard wye interchange, the mainline route might take the right-hand branch of a split, which would require that the left-hand branch be treated as a left exit under some state exit numbering policies, but if traffic on the left-hand branch merged onto a new freeway from the right, the movement would not have any of the operational disadvantages of a left exit or left merge.

[luokou]

I-405 North in Portland is practically an entire left exit in itself! From I-5 North to I-405 North is a left exit, not to mention the very first exit (SW Naito Pkwy) is a left exit. Continuing on I-405 North, the next left is US 30 West, which is then followed by the US 30 East exit (technically just a movement to I-5 South). Other examples of a left exit in the Portland metro area:
I-5 South -> I-405 North
I-5 South -> Mt. Hood Freeway (the ghost ramp still exists)
Outside of the metro area, I-84 at Multnomah Falls (both directions)

A few of these in the LA County area:
I-5 North at Firestone Blvd
I-5 North -> I-710 North
I-710 South -> I-5 South
US 101 South -> I-10 East
Of course, there are the very numerous HOV left exits in SoCal...

[vdeane]

Here's what we have in Rochester:
-I-490 east to NY 390 north
-I-490 west to I-390 south
-I-390 north to I-490 west
-NY 390 south to I-490 east
-I-490 east to Inner Loop clockwise
-Inner Loop clockwise to University Ave
-Left enterance from Inner Loop clockwise to I-490 east
-NY 590 south to I-490
-NY 590 north to NY 104 east (left enterance)
-NY 590 north to NY 104 west (left enterance)
-NY 104 west to NY 590 south
-I-390 south to I-590

[Revive 755]

St. Louis area

* I-44:
1) EB left exit to Lafayette Avenue (Exit 290B), was going to be a two lane ramp for MO 755

* I-55 (MO side)
1) NB left exit to WB I-44 and the Truman speedtrap
2) NB left exit to WB I-70 and Memorial Drive
3) SB left entrance from EB I-70 and Memorial Drive
The latter two will technically change to major splits/right exits off of I-44 after the new I-70 bridge opens, however this will create a left side entrance/exit situation with respect to I-44 at the southern I-55 interchange

* I-55 (IL side)
1) SB left exit to 3rd Street in East St. Louis
2) NB left entrance from the MLK Bridge
3) SB left exit to the MLK Bridge
4) SB left entrance from WB I-64/SB IL 3
5) NB left entrance loop from SB IL 3
6) SB left exit to EB I-64

* US 40/Avenue of the Saints corridor
1) WB/NB left exit to WB I-70 in Wentzville
2) EB/SB left exit to EB I-70 in Wentzville
3) WB left entrance from Vandeventer Avenue in St. Louis City; according to the I-64 FEIS, "was shown
to be very difficult and costly to construct" (http://www.thenewi64.org/feis/Chap_8/ChapterVIII_FINAL.pdf, Page 27/102)
4) EB left entrance from Forest Park Avenue
5) EB left exit to 11th Street
6) WB left entrance from Broadway

* I-64 (IL side)
1) EB left entrance from SB I-55

* I-70 (MO side)
1) WB left entrance from MO 115/Natural Bridge
2) EB left exit to NB I-170
3) EB left entrance from SB I-170
4) WB left entrance from NB I-170
5) WB left exit to SB I-170
6) EB left exit to SB I-55
7) WB left entrance from NB I-55
The last two will be replaced with left entrances to/from I-44 when the new bridge opens

* I-70 (IL side)
1) EB left entrance from EB I-270

As part of the new bridge project, relocated WB I-70 will get a left entrance from WB I-64

* I-170
1) NB left exit to WB I-70
2) SB left entrance from WB I-70
3) NB left exit for Lambert Airport/right side of WB I-70
4) SB left exit for EB I-170
5) NB left entrance from EB I-70; could have been changed to a right side exit as part of a TIGER 2 grant
6) NB left exit to Boeing (service exit)
7) SB left entrance from Boeing

* I-255 (IL side)
1) SB left exit/major split with SB IL 3
2) SB left entrance from NB IL 3

* IL 3 freeway section near I-255
1) NB left exit to I-255 (real fun trying to weave to from the Palmer Road/Quarry Road entrance ramp

* Could count SB IL 3 to NB I-255 around Dupo, but I'm not going to since the section of IL 3 north of that intersection is semi-expressway

* MO 21/Blood Alley Replacement Freeway
1) Left entrance from Old 21 just south of MO 141; this one is one of those fun added lanes on the left, current right hand lane drops at the next exit

St. Louis area grand total:  36
- Total service left side ramps:  8

[OracleUsr]

There are a number of them within an hour of my house:

Exit 188 (I-40E to Bus I-40E, Winston-Salem)
Exit 83 (I-77N to US 21 Bypass N, Elkin)
Exit 11B (I-77N to NC 16N, Charlotte)
Exit 5 (I-74W to I-77S, Mount Airy)
Exit 101 (I-77S to I-74E, Mount Airy)

Go to 100 miles:
Exit 46A (I-40W to I-26E, Asheville)
Exit 46B (I-40E to I-26W/I-240E, Asheville)
Exit 219 (I-40W to I-85 Bus. S, Greensboro)
Exit 220 (I-40E to Randleman Road, Greensboro)

[Brandon]

For Chicagoland:

Left exits, left entrances marked with *:
I-190 W to I-294 S (Exit 1D)
I-55 S to IL-129 S (Exit 238)
I-80 E to I-57 N (Exit 151 B)*
I-80 W to I-57 S (Exit 151 A)*
I-90/94 Edens Junction (uses I-94 exit numbers for an I-90 left exit)
I-290 W to I-88 W (Exit 15B)
I-290 to IL-43 (Harlem Ave) (Exit 21B)*
I-290 to Austin Ave (Exit 23A)*
US-12/20/45 S to IL-171 N and I-294 S*
Stony Island Ave S to I-90 E
IL-38 E to I-290 E
US-41 to IL-132*
US-20 to Villa St (Old 20)*
US-20 to Larkin Ave (Old 20)
I-94 W to I-57 S (Exit 63)

Left entrances without left exits:
I-57 N to I-94 W (Dan Ryan Merge)
79th St W to IL-171 S
Rapid fire ramps on the Kennedy (I-90/94):
North: Adams, Monroe, Madison, Randolph
South: Lake, Randolph, Washington, Madison, Monroe
Randolph St to US-41 N
Grand Ave/Illinois St to US-41 S
IL-43 N to US-41 N

Peoria:
I-74 W to I-474 W (Exit 99)
I-474 W to I-74 W (Exit 0) - left exit from I-474, left entrance on I-74

Springfield:
I-55 N to I-72 W and BL-55 N
Left entrance from I-72 E at same interchange

Decatur:
I-72 W to US-51 S and US-36 E, left entrance from US-36 W

Rockford:
US-20 E to BL-20 E

Bloomington/Normal:
I-55 S to I-74 E (Exit 157 on I-55)

[Duke87]

Define "my area".

In Fairfield County, CT (total of 5):
- I-84 exit 3 (x2)
- I-84 exit 7 (x2)
- CT 8 exit 6

All are freeway to freeway. One is a major split and thus only sort of counts.

In Westchester County, NY (total of 18):
- I-684 exit 1 (x2)
- Hutchinson River Pkwy to I-684 connection (x2)
- Hutchinson River Pkwy exit 15 (x2)
- Sprain Brook Pkwy at I-287 interchange (x2)
- I-87 exit 8
- Bronx River Pkwy/Sprain Pkwy split (x2)
- Taconic Pkwy/Sprain Pkwy split (x2)
- NY 9A/100 at NY 117 (x4)
- NY 9A/US 9 split by Croton-Harmon

Nine of those are freeway to freeway, five are freeway to parkway with lights. Twelve of them are major splits and thus only sort of count.

In New Haven county, CT (total of 18, soon to be 15):
- CT 8/I-84 interchange (x7)
- CT 8 exit 31 (x2)
- CT 8 exit 35
- I-95/I-91/CT 34 interchange (x3, but all will soon be eliminated)
- I-91 exit 6
- I-91 exit 13
- I-91/I-691/CT 15/CT 66 interchange (x3)

Thirteen, maybe fourteen (depending on whether you count the Wharton Brook Connector as a freeway or just a long exit ramp) are freeway to freeway, soon to be ten, maybe eleven. Only one of the three about to be eliminated could maybe be called a major split.

[iwishiwascanadian]

Greater Hartford

I-84
Exit 42 - Trout Brook Drive/Park Road
Exit 43 - Park Road
Exit 45 - Flatbush Avenue
Exit 46 - Sisson Avenue
Exit 53 - Governor Street
Exit 54 - CT 2 West
Exit 55 - CT 2 East
Exit 56 - Governor Street
Exit 57 - CT 15 South to US 5 South
Some of these are Eastbound Lefts, Some are Westbound Lefts

I-91
Exit 29A - Whitehead Highway
Exit 30 - I-84 East
Exit 31 - State Street
Exit 32 A-B - I-84 West/Trumbull Street
Some are Northbound Lefts, Some are Southbound Lefts

[The Premier]

I-77 has a total of four left exits:

Exit 122A (SB only)
Exit 122B (NB only)
Exit 125A (NB only)
Exit 136 (NB only)

I-76 only has two:

Exit 23A (EB only)
Exit 23B (SB only)

SR 8 has one exit and an entrance for I-271 due to the new interchange.

[Zmapper]

Denver:
Interstate 25
I-25 SB to US-36/I-270 EB
I-25 NB to US-36 WB
HOV I-25 to 70th street
HOV I-25 to US-36
HOV I-25 to 19th/20th streets

Interstate 70
I-70 EB to I-76 EB
I-70 WB to Colfax Ave

I think that might be it.

[akotchi]

I pass three just on my way to work . . .

U.S. 1 NB to Pa 32 in Morrisville, PA
U.S. 1 NB to Olden Ave. in Trenton, NJ
U.S. 1 NB to Bus. U.S. 1 in Trenton, NJ

[Ian]

Here are a few ones that come to mind:

I-95 NB at exit 11 for I-295 in Warwick, RI
I-95 NB at exit 45 for MA 128 in Peabody, MA
I-95 NB at exit 4
I-93 NB and SB at I-293 in South Manchester, NH
I-93 SB at I-293/Everett Turnpike in Hooksett, NH
I-89 NB at exit 5 in Hopkinton, NH
NH 16/Spaulding Turnpike SB at exit 3 in Portsmouth, NH
I-95 SB at exit 12 for I-93 NB in Norwood, MA
I-93 NB and SB at exit 4 for MA 24 in Randolph, MA
I-90/Mass Pike eastbound at exit 18 in Brookline, MA
I-290 EB at exit 26B for I-495 NB in Marlborough, MA
I-95 NB at exit 22 in Philadelphia, PA
I-95 SB at exit 20 in Philadelphia, PA
I-76 EB at exits 347A-B in Philadelphia, PA
I-76 WB at exit 346A in Philadelphia, PA
I-76 EB at exit 344 for I-676 EB in Philadelphia, PA
I-76 EB at exit 340A in Philadelphia, PA
I-76 WB at exit 339 in Philadelphia, PA
I-76 WB at 331A for I-476 SB in Conshohocken, PA

[tdindy88]

For Indianapolis:

At the North Split downtown:
I-65 SB to I-70 WB/I-65 SB
I-70 WB to I-65 SB/I-70 WB
I-65 NB/I-70 EB to I-65 NB

At the South Split downtown:
I-65 NB to I-70 WB
I-70 EB to I-65/I-70 NB
I-65 SB/I-70 WB to I-65 SB

Elsewhere:
I-65 NB to West St. (Exit 114)
I-465 NB to I-65 NB (Exit 20)
I-465 NB to I-865 WB (Exit 25)

[njroadhorse]

I-280 East to 6th Street - Newark, NJ
I-78 East to Clinton Street - Newark, NJ
I-78 East to NJ 24 - Summit, NJ (I believe this is one?)
Garden State Parkway North to NJ 50 - Seaville, NJ
At least one in the conglomeration of highways around Newark Liberty International Airport

[Mergingtraffic]

Define "my area".



In New Haven county, CT (total of 18, soon to be 15):
- CT 8/I-84 interchange (x7)
- CT 8 exit 31 (x2)
- CT 8 exit 35

The DOT finished it's study of the I-84/CT-8 interchange, if you look at Concept 7, it has one lone left on-ramp from I-84 EB to CT-8 NB.  Ugh!

http://www.ct.gov/dot/lib/dot/documents/dpolicy/WINS/Conceptual-Alt-7.pdf

But Concept 8 is the best!

http://www.ct.gov/dot/lib/dot/documents/dpolicy/WINS/Conceptual-Alt-8.pdf

[Mergingtraffic]

If it is more than one lane like a two lane exit, would you consider that a split or a left exit??

or does it depend if the split is striped with an option lane or not??

[deathtopumpkins]

Hampton Roads:

- I-64 westbound at VA 143 (Williamsburg Business Route)
- I-64 westbound at I-564
- I-64/564 HOV entrance/exits
- I-264 at the Berkeley Bridge - eastbound left 2 lanes exit for downtown, westbound left 2 lanes exit for I-464 south.
- I-64/264 HOV entrance/exits
- I-64 westbound onramp from VA 168 (Tidewater Dr)

That about sums it up for interstate interchanges. Might be a few more associated with the US 58/VA 164 interchange or Bowers Hill.

[hbelkins]

Discounting freeway-to-freeway connections, I can't think of any on Kentucky's interstate system.

[PAHighways]

Pittsburgh

I-279
Exit 1B - North Shore (NB off)
Exit 1C - PA 65 (NB off/on)
HOV - 9th Street (SB off morning rush)
HOV - I-579 (SB off morning rush)
HOV - McKnight Road (SB on morning rush)
I-279 - HOV (SB on morning rush/NB off afternoon rush)

I-579
6th Avenue/Forbes Avenue (NB off/SB on)
7th Avenue/Convention Center (NB off)

I-376
Exit 15 - US 422 (EB off/WB on)
Exit 70A - Boulevard of the Allies/Liberty Avenue (EB off/WB on)
Exit 70B -Fort Duquesne Boulevard/Strip District (EB off)
Exit 70C - I-279/Fort Duquesne Bridge (EB off/on)
Exit 70D - Stanwix Street (WB off/on)
Exit 71A - Grant Street (off/EB on)
Exit 72B - Boulevard of the Allies (EB on)

PA 28
Exit 4 - Butler Street/Etna (NB off)
Exit 5B - PA 8 NORTH/Butler (NB off/on)
Exit 6 - TO PA 8/Highland Park Bridge (SB off/on)
Exit 9 - Blawnox (SB on)

[shadyjay]

I'm proud to live in a state which does not have a single left hand exit or entrance on a mainline interstate.  The only left exits are those from where an interstate ends and splits (such as I-93's terminus, splitting into ramps to I-91 North and South or I-189's terminus, but both ramps enter on the proper side of the interstate).

My closest left exit would be the one on I-89NB just outside of Concord NH, or Exit 27 on I-91SB near Greenfield MA.

[sglaughlin]

Birmingham, AL's I-20/59 - I-65 interchange has the following left-lane exits:  I-65 NB to I-20/59 WB/SB,  I-20/59 WB/SB to I-65 SB, I-20/59 EB/NB to I-65 NB , and I-65 SB to I-20/59 EB/NB are all left exits, with corresponding left entrances.