180 degree alignment shifts

[yakra]

ME-9 in 15,777,594,373 different places between Wells and South Portland.

Michigan's M-123 is shaped like an upside down J, so that you're heading due south for its last few miles to its "northern" terminus near Newberry.

other hook-shaped roads include ME-3 and CA-18.

Also: ME114 and ME175

[Thing 342]

Both directions of US 19 Truck are concurrent with each other near its junction with I-376 near the Fort Pitt Tunnel.

[yakra]

AB 2 goes north from the MT border to Grimshaw, then turns west and south toward Grande Prairie.

[Henry]

The Delaware Memorial Bridge is also a location where SB traffic is actually heading north, and vice versa.

I believe the Fort McHenry Tunnel is the same way, as it bends underneath the Baltimore Harbor.

[Buck87]

On Ohio's Marblehead peninsula OH 163 wraps around the tip of the peninsula and has a 3 mile section of wrong way alignment leading to it's eastern terminus. The OH 163 designation used to end right at the peninsula's easternmost tip just south of the Marblehead Lighthouse, which is what Google still shows, but sometime in the past decade an extra section of Bayshore road has been signed at 163 as far as Hartshorn Rd.

163 East sign going due west

[PHLBOS]

MA 2/Mohawk Trail's hairpin turn near N. Adams.

http://goo.gl/maps/qg11A

[JCinSummerfield]

US-41 in Michigan doesn't make a full 180° mis-alignment, but does travel due east at some points, only to travel due west later on.  While going east/west, there are spots where it angles in the opposite direction from what is signed.

[The High Plains Traveler]

NM-161 NE of Las Vegas. It begins on NM-518, heads southeastward to I-25, then turns northeast to parallel the freeway. It then turns back north-northwest to end at Fort Union National Monument. Both exits with I-25 are marked the same. That latter segment was formerly NM-477, but it became the extension of 161 in the 1988 renumbering.

[renegade]

M-29 around Anchor Bay and Harsen's Island between Fair Haven and Pearl Beach.

[hotdogPi]

I-93 on both ends has it turn so "north" or "south" is the wrong way. It's not quite 180 degrees though.

[deathtopumpkins]

MA 127 doee a full circle around Cape Ann. Comes a few blocks from ending at itself too.

[JustDrive]

EB I-80 at the eastern terminus of I-84 in Utah is actually headed northwest.

NB US 101 between Woodland Hills and Calabasas, CA heads southwest

NB CA 14 through Acton heads southeast

SB I-280 at its southern terminus in San Jose is headed northeast

NB CA 1 in Santa Cruz is also headed in the wrong direction

SB CA 183 at its southern terminus in Salinas is also headed due north, with no connections to SB 101

[Thing 342]

AK-1 is signed mostly east-west (with some odd North-South markers around Anchorage) but at its eastern end in Homer, it is going due west.

[JustDrive]

US 101 in downtown Santa Barbara also has a brief 180º shift

[jp the roadgeek]

On I-84 in CT just east of Exit 30, there is a place where eastbound traffic is headed west, and vice versa.  Also, there are a few roads that loop south of US 1, loop back over, then head north.  While the loop starts out heading south toward LI Sound, it is actually marked North.  CT 154 and CT 213 are examples of this.  Also, a switchback on CT 162 in West Haven near I-95 Exit 42 where you're heading opposite.

[dlainhart]

In Fort Lee, NJ I-95 does the same after entering NJ from NY heading SB on the interstate you actually head due north as seen by the directional indicator.

How many other places (excluding mountain roads where the roads are aligned very winding due to the topography of the land) have the situation where this happens?

I-95 at that point is a mountain road. How else is it supposed to leap over the Palisades?

Dylan T. Lainhart / Binghamton, N.Y.

[Dr Frankenstein]

A skier from Montreal going to Mont Orford wants to head north onto the beginning of Hwy 141 southbound. The highway makes a wide turn to head south shortly after the ski area.

https://maps.google.ca/maps?saddr=Autoroute+10+E&daddr=Chemin+du+Parc&hl=fr&ll=45.296385,-72.199059&spn=0.103727,0.154324&sll=45.316849,-72.217062&sspn=0.006481,0.009645&geocode=FesRswIdN6Cx-w%3BFZp_swIdKAey-w&t=m&mra=mift&mrsp=1&sz=17&safe=strict&z=13

[UptownRoadGeek]

I was noticing that US 90 Business in LA crossing the Mississippi River (Crescent City Connection), has its alignment in a full reverse where US 90 Business EB is actually heading true west and vice versa for WB going true East.  In fact the Huey P. Long Bridge can be seen on the horizon as you head into New Orleans, where you  just were south of that crossing if you had indeed been traveling US 90 Business EB from conception.

I don't know if you payed attention, but the Huey P is setup exactly the same. EB US 90 crosses the Huey P in a westerly direction, although it isn't due west, before turning back east to head into the city. Also, if you look to your right as you cross over Tulane Ave on the I-10 in the business district you can see I-10 crossing the same street again headed in the opposite direction two miles in the distance and vice versa.

[DandyDan]

WI 13 goes north from US 2 in the Ashland area, but as it turns west towards Superior, there are some southbound segments.

[cjk374]

Louisiana is infamous for roads that have no consistent direction. As with the above example, topography plays a role but sometimes the culprit is just non-sensical routing. See LA 27, LA 44, LA 16, LA 112, LA 113, LA 428, LA 606, etc.

LA 151 is part of the etc.  It's almost 70 miles long, starting in Arcadia running northbound.  After a few sharp turns, you end up eastbound through Dubach.  Another couple of sharp turns later, you're headed southbound going through Calhoun. It crosses I-20 twice, exits 69 & 101...a distance of 32 miles.  The DOTD only puts directional banners over the shield in Arcadia and at the junction with LA 146 @ Goose Creek.