What is the longest bridge you have been on?

[CNGL-Leudimin]

The Po river bridge along Italian A13 near Ferrara, with the much more impressive Aquitaine bridge in Bordeaux, France in a close second. I thought the latter was longer. Anyway nowhere as impressive as yours, the Po river bridge is only 1.13 miles long. I may have been on longer bridges, but I'm not sure.

The longest bridge I've driven across it's even more ridiculous: This one (Sign says 3,000 ft).

[ftballfan]

Seven Mile Bridge and Mackinac Bridge for me (as a passenger). Longest I've driven on is either Zilwaukee or the M-231 Grand River bridge

[Hurricane Rex]

Although not as impressive as a lot of others on this thread, mine is the Astoria-Megler bridge although I hope to change that in the near future (not likely though).

[inkyatari]

Lake Ponchatrain.

Since I became an adult...  Probably the Goethals in NYC

[Richard3]

In my case, it was the Confederation Bridge, between New Brunswick and Prince Edward Island, in Canada.  I crossed it with a tractor-trailer.

This bridge is the 34th longest in the world, according to the Wikipeddia list of the longest bridges in the world, at 12,900 meters (8,016 miles, or 42322,8 feet).

[D-Dey65]

As a passenger: Chesapeake Bay Bridge/Tunnel,...

For me, it's both as a passenger and driver. With the exception of Lake Ponchatrain, all the other bridges on your list don't even come close.

[Richard3]

Just for fun, I took out all USA & Canada road bridges from the Wikipedia's List of the world's longest bridges (over 3 km). As in every list on the web, we may find that some bridges are missing, or some information may be wrong.  Please just tell me if any.

Here they are;

1- Lake Pontchartrain Causeway, in Louisiana (LA), connecting N. Causeway Blvd. on 38,442 km (23,887 miles).
2- Manchac Swamp Bridge (LA), supporting I-55 on 36,71 km (22,811 miles).
3- Atchafalaya Basin Bridge (LA) I-10 on 29,29 km (18,2 miles).
4- Chesapeake Bay Bridge & Tunnel (VA) US-13 on 24,14 km (15 miles).
5- Bonnet Carré Spill Bridge (LA) I-10 on 17,702 km (11 miles).
6- Louisiana Highway 1 Bridge (LA) LA-1 on 13,3 km (8,264 miles).
7- Confederation Bridge (NB-PE) Trans-Canada Hwy on 12,9 km (8,016 miles).
8- Jubilee Parkway (AL) I-10 on 12,875 km (8 miles).
9- San Mateo - Hayward Bridge (CA) CA-92 on 11,27 km (7,003 miles).
10- Seven-Mile Bridge (FL) US-1 on 10,887 km (6.765 miles).
11- General W. K. Wilson Jr. Bridge (AL) I-65 on 9,786 km (6,081 miles).
12- Chacahoula Swamp Bridge (LA) US-90 on 9,005 km (5,595 miles).
13- Frank Davis "Naturally N'Awlins" Memorial Bridge (LA) I-10 on 8,851 km (5,5 miles).
14- Richmond - San Rafael Bridge (CA) I-580 on 8,851 km (5,5 miles).
15- Virginia Dare Memorial Bridge (NC) US-64 Bypass on 8,369 km (5,2 miles).
16- Mackinac Bridge (MI) I-75 on 8,038 km (4,995 miles).
17- LaBranche Wetlands Bridge (LA) I-310 on 7,902 km (4,91 miles).
18- Maestri Bridge (LA) US-11 on 7,693 km (4,78 miles).
19- James River Bridge (VA) US-17 on 7,425 km (4,614 miles).
20- Champlain Bridge (QC) A-10/15/20 on 7,414 km (4,607 miles).
21- Huey P. Long Bridge (LA) US-90 on 7 km (4,35 miles).
22- Chesapeake Bay Bridge (MD) US-50/301 on 6,946 km (4,316 miles).
23- Sunshine Skyway Bridge (FL) I-275 on 6,598 km (4,1 miles).
24- St. George Island Bridge (FL) FL-300 on 6,588 km (4,094 miles).
25- Astonia - Megler Bridge (OR-WA) US-101 on 6,545 km (4,067 miles).
26- Hernando de Soto Bridge (AR-TN) I-40 on 5,954 km (3,7 miles).
27- Mid-Bay Bridge (FL) FL-293 on 5,793 km (3,6 miles).
28- Pulaski Skyway (NJ) US-1/9 on 5,636 km (3,502 miles).
29- Garden City Skyway (ON) QEW on 5,633 km (3,5 miles).
30- Albemarle Sound Bridge (NC) NC-32/94 on 5,627 km (3,496 miles).
31- Dauphin Island Bridge (AL) AL-193 on 5,43 km (3,374 miles).
32- Yolo Causeway (CA) I-80 on 5,2 km (3,231 miles).
33- Buckman Bridge (FL) I-295 west on 4,968 km (3,087 miles).
34- Tappan Zee Bridge* (NY) I-87/287 on 4,881 km (3,033 miles).
35- Howard Franklin Bridge Southbound (FL) I-275 south on 4,846 km (3,011 miles).
36- Howard Franklin Bridge Northbound (FL) I-275 north on 4,838 km (3,006 miles).
37- Wright Memorial Bridge (NC) US-158 on 4,828 km (3 miles).
38- Pensacola Bay Bridge (FL) US-98 on 4,767 km (2,962 miles).
39- Lindsay C. Warren Bridge/Alligator River Bridge (NC) US-64 on 4,55 km (2,827 miles).
40- Gandy Bridge Eastbound (FL) US-92 east on 4,529 km (2,814 miles).
41- Sault Ste. Marie International Bridge (MI-ON) connects I-75 with Huron St. on 4,48 km (2,784 miles).
42- Bayside Bridge (FL) CR-611 on 4,27 km (2,653 miles).
43- Commodore Barry Bridge (NJ-PA) US-322 on 4,24 km (2,635 miles).
44- Gandy Bridge Westbound (FL) US-92 west on 4,226 km (2,626 miles).
45- Escambia Bay Bridge (FL) I-10 on 4,224 km (2,626 miles).
46- Verrazano-Narrows Bridge (NY) I-278 on 4,176 km (2,595 miles).
47- Greenville Bridge (MS-AR) US-82`278 on 4,133 km (2,568 miles).
48- Crescent City Connection (LA) US-90 Business on 4,093 km (2,543 miles).
49- Arthur Ravenel Jr. Bridge (SC) US-17 on 4,023 km (2,5 miles).
50- Fred Hartman Bridge (TX) TX-146 on 4 km (2,485 miles).
51- Vicksburg Bridge/Chris Smith Bridge (LA) I-20 on 3,954 km (2,457 miles).
52- John James Audubon (Mississippi River) Bridge (LA) LA-10 on 3,927 km (2,44 miles).
53- Herbert C. Bonner Bridge (NC) NC-12 on 3,921 km (2,436 miles).
54- Queen Isabella Causeway (TX) SPR-100 on 3,81 km (2,367 miles).
55- Walt Withman Bridge (PA-NJ) I-76 on 3,652 km (2,269 miles).
56- San Diego - Coronado Bridge (CA) CA-75 on 3,407 km (2,117 miles).
57- Lake Jesup Bridge (FL) FL-417 on 3,379 km (2,1 miles).
58- Delaware Memorial Bridge Westbound (NJ-DE) I-295 west/US-40 west on 3,291 km (2,045 miles).
59- Delaware Memorial Bridge Eastbound (DE-NJ) I-295 east/US-40 east on 3,281 km (2,039 miles).
60- Hale Boggs Memorial Bridge (LA) I-310 on 3,261 km (2,026 miles).
61- Dames Point Bridge (FL) I-295 east on 3,245 km (2,016 miles).
62- Great South Bay Bridge (NY) Robert Moses Causeway on 3,206 km (1,992 miles).
63- San Francisco - Oakland Bay Bridge (CA) I-80 on 3,141 km (1,952 miles).
64- Talmadge Memorial Bridge (GA) US-17 on 3,06 km (1,901 miles).

* Probably the one in demolition now.

Of those bridges, I passed on number 7 (Confederation Bridge), 20 (Champlain Bridge), 33 (Buckman Bridge) and 61 (Dames Point Bridge), all with a tractor-trailer, but I also passed number 20 with many kinds of vehicles, as this bridge is close from home.

[7/8]

Using Richard3's helpful list . I changed the decimals to periods because I'm an anglophone

7- Confederation Bridge (NB-PE) Trans-Canada Hwy on 12.9 km (8.016 miles).
16- Mackinac Bridge (MI) I-75 on 8.038 km (4.995 miles).
20- Champlain Bridge (QC) A-10/15/20 on 7.414 km (4.607 miles).
29- Garden City Skyway (ON) QEW on 5.633 km (3.5 miles).
41- Sault Ste. Marie International Bridge (MI-ON) connects I-75 with Huron St. on 4.48 km (2.784 miles).
57- Lake Jesup Bridge (FL) FL-417 on 3.379 km (2.1 miles).
61- Dames Point Bridge (FL) I-295 east on 3.245 km (2.016 miles).

[jwolfer]

I used to take 33 the the Buckman Bridge (i295) over St John's River in Jacksonville FL almost every day.. there are a ton of long bridges in Louisiana

Z981

[froggie]

Based on Richard3's list, I've been on the top 5, 11 of the top 15, 21 of the top 30, and 41 total.

[Mapmikey]

Not sure what the definition of a bridge is in this context...

I-526 bridge over Cooper River, marshland, railroads, through 4 exits is 5.2 miles long...

Anyway, I have been 4 of the top 5; 10 of the top 15; 21 of the top 30; and 47 overall

[Rothman]

Only been on 37 of the bunch myself:

1	Lake Pontchartrain Causeway on 38.442 km (23.887 miles).	Y
2	Manchac Swamp Bridge (LA) on 36.71 km (22.811 miles).	N
3	Atchafalaya Basin Bridge (LA) I-10 on 29.29 km (18.2 miles).	Y
4	Chesapeake Bay Bridge & Tunnel (VA) US-13 on 24.14 km (15 miles).	Y
5	Bonnet Carré Spill Bridge (LA) I-10 on 17.702 km (11 miles).	Y
6	Louisiana Highway 1 Bridge (LA) LA-1 on 13.3 km (8.264 miles).	N
7	Confederation Bridge (NB-PE) Trans-Canada Hwy on 12.9 km (8.016 miles).	N
8	Jubilee Parkway (AL) I-10 on 12.875 km (8 miles).	Y
9	San Mateo - Hayward Bridge (CA) CA-92 on 11.27 km (7.003 miles).	N
10	Seven-Mile Bridge (FL) US-1 on 10.887 km (6.765 miles).	Y
11	General W. K. Wilson Jr. Bridge (AL) I-65 on 9.786 km (6.081 miles).	Y
12	Chacahoula Swamp Bridge (LA) US-90 on 9.005 km (5.595 miles).	N
13	Frank Davis Naturally N'Awlins Memorial Bridge (LA) I-10 on 8.851 km (5.5 miles).	N
14	Richmond - San Rafael Bridge (CA) I-580 on 8.851 km (5.5 miles).	N
15	Virginia Dare Memorial Bridge (NC) US-64 Bypass on 8.369 km (5.2 miles).	Y
16	Mackinac Bridge (MI) I-75 on 8.038 km (4.995 miles).	N
17	LaBranche Wetlands Bridge (LA) I-310 on 7.902 km (4.91 miles).	Y
18	Maestri Bridge (LA) US-11 on 7.693 km (4.78 miles).	N
19	James River Bridge (VA) US-17 on 7.425 km (4.614 miles).	Y
20	Champlain Bridge (QC) A-10/15/20 on 7.414 km (4.607 miles).	N
21	Huey P. Long Bridge (LA) US-90 on 7 km (4.35 miles).	N
22	Chesapeake Bay Bridge (MD) US-50/301 on 6.946 km (4.316 miles).	Y
23	Sunshine Skyway Bridge (FL) I-275 on 6.598 km (4.1 miles).	Y
24	St. George Island Bridge (FL) FL-300 on 6.588 km (4.094 miles).	N
25	Astonia - Megler Bridge (OR-WA) US-101 on 6.545 km (4.067 miles).	Y
26	Hernando de Soto Bridge (AR-TN) I-40 on 5.954 km (3.7 miles).	Y
27	Mid-Bay Bridge (FL) FL-293 on 5.793 km (3.6 miles).	N
28	Pulaski Skyway (NJ) US-1/9 on 5.636 km (3.502 miles).	Y
29	Garden City Skyway (ON) QEW on 5.633 km (3.5 miles).	N
30	Albemarle Sound Bridge (NC) NC-32/94 on 5.627 km (3.496 miles).	N
31	Dauphin Island Bridge (AL) AL-193 on 5.43 km (3.374 miles).	N
32	Yolo Causeway (CA) I-80 on 5.2 km (3.231 miles).	N
33	Buckman Bridge (FL) I-295 west on 4.968 km (3.087 miles).	Y
34	Tappan Zee Bridge* (NY) I-87/287 on 4.881 km (3.033 miles).	Y
35	Howard Franklin Bridge Southbound (FL) I-275 south on 4.846 km (3.011 miles).	Y
36	Howard Franklin Bridge Northbound (FL) I-275 north on 4.838 km (3.006 miles).	Y
37	Wright Memorial Bridge (NC) US-158 on 4.828 km (3 miles).	Y
38	Pensacola Bay Bridge (FL) US-98 on 4.767 km (2.962 miles).	Y
39	Lindsay C. Warren Bridge/Alligator River Bridge (NC) US-64 on 4.55 km (2.827 miles).	Y
40	Gandy Bridge Eastbound (FL) US-92 east on 4.529 km (2.814 miles).	N
41	Sault Ste. Marie International Bridge (MI-ON) connects I-75 with Huron St. on 4.48 km (2.784	N
42	Bayside Bridge (FL) CR-611 on 4.27 km (2.653 miles).	N
43	Commodore Barry Bridge (NJ-PA) US-322 on 4.24 km (2.635 miles).	Y
44	Gandy Bridge Westbound (FL) US-92 west on 4.226 km (2.626 miles).	N
45	Escambia Bay Bridge (FL) I-10 on 4.224 km (2.626 miles).	Y
46	Verrazano-Narrows Bridge (NY) I-278 on 4.176 km (2.595 miles).	Y
47	Greenville Bridge (MS-AR) US-82`278 on 4.133 km (2.568 miles).	N
48	Crescent City Connection (LA) US-90 Business on 4.093 km (2.543 miles).	Y
49	Arthur Ravenel Jr. Bridge (SC) US-17 on 4.023 km (2.5 miles).	Y
50	Fred Hartman Bridge (TX) TX-146 on 4 km (2.485 miles).	N
51	Vicksburg Bridge/Chris Smith Bridge (LA) I-20 on 3.954 km (2.457 miles).	Y
52	John James Audubon (Mississippi River) Bridge (LA) LA-10 on 3.927 km (2.44 miles).	N
53	Herbert C. Bonner Bridge (NC) NC-12 on 3.921 km (2.436 miles).	Y
54	Queen Isabella Causeway (TX) SPR-100 on 3.81 km (2.367 miles).	N
55	Walt Whitman Bridge (PA-NJ) I-76 on 3.652 km (2.269 miles).	Y
56	San Diego - Coronado Bridge (CA) CA-75 on 3.407 km (2.117 miles).	N
57	Lake Jesup Bridge (FL) FL-417 on 3.379 km (2.1 miles).	N
58	Delaware Memorial Bridge Westbound (NJ-DE) I-295 west/US-40 west on 3.291 km (2.045 miles).	Y
59	Delaware Memorial Bridge Eastbound (DE-NJ) I-295 east/US-40 east on 3.281 km (2.039 miles).	Y
60	Hale Boggs Memorial Bridge (LA) I-310 on 3.261 km (2.026 miles).	Y
61	Dames Point Bridge (FL) I-295 east on 3.245 km (2.016 miles).	Y
62	Great South Bay Bridge (NY) Robert Moses Causeway on 3.206 km (1.992 miles).	Y
63	San Francisco - Oakland Bay Bridge (CA) I-80 on 3.141 km (1.952 miles).	Y
64	Talmadge Memorial Bridge (GA) US-17 on 3.06 km (1.901 miles).	Y

[Marf]

Longest for me is the Sunshine Skyway.

[brownpelican]

I-10/I-55 combo bridge west of New Orleans.
Lake Pontchartrain Causeway (both directions)
Atchafalaya Basin Bridge
East and West Pascagoula River bridge on I-10.

[OracleUsr]

Chesapeake Bay Bridge-Tunnel probably.

Was going to cross the Condederacy Bridge to PEI one time in 2012 had I gotten to Cape Jourmain a day earlier, but I was trying to get back to Bangor to have a full day before my flight back to NC.  Would have loved to get a couple of PEI Lighthouses to add to my collection.

[Buck87]

Thanks for the handy list Richard3

Here are mine:

3- Atchafalaya Basin Bridge (LA) I-10
4- Chesapeake Bay Bridge & Tunnel (VA) US-13
5- Bonnet Carré Spill Bridge (LA) I-10
8- Jubilee Parkway (AL) I-10
13- Frank Davis "Naturally N'Awlins" Memorial Bridge (LA) I-10
16- Mackinac Bridge (MI) I-75
22- Chesapeake Bay Bridge (MD) US-50/301
25- Astoria - Megler Bridge (OR-WA) US-101
26- Hernando de Soto Bridge (AR-TN) I-40
46- Verrazano-Narrows Bridge (NY) I-278
49- Arthur Ravenel Jr. Bridge (SC) US-17
64- Talmadge Memorial Bridge (GA) US-17

[kphoger]

16- Mackinac Bridge (MI) I-75 on 8,038 km (4,995 miles).

This is the longest one for me.  But I was hitchhiking, not driving.

[jeffandnicole]

55- Walt Withman Bridge (PA-NJ) I-76 on 3,652 km (2,269 miles).
58- Delaware Memorial Bridge Westbound (NJ-DE) I-295 west/US-40 west on 3,291 km (2,045 miles).
59- Delaware Memorial Bridge Eastbound (DE-NJ) I-295 east/US-40 east on 3,281 km (2,039 miles).

This one's a bit notable for this reason:

At the Walt Whitman Bridge, the Delaware River is only about 1,650 feet wide.  At the Delaware Memorial Bridge, the river is 1.2 miles wide.  Yet, the Walt Whitman Bridge is nearly a quarter-mile longer due to going over significant pieces of land. 

The toll plaza for the Walt Whitman bridge is about 1 1/4 miles from the river, yet the bridge ends barely 1/10th of a mile from the toll plaza.

[Skye]

As a passenger, Chesapeake Bay Bridge and Tunnel and Sunshine Skyway Bridge.  As a driver, nothing impressive, probably an Ohio River Bridge in either Cincinnati or Louisville.