SERENDIPITOUS INTERCHANGES
IN INDIANA

Some interchanges are built because conditions make it easier to build one than to do anything else. Often the bridge needed for the interchange already exists, spanning a waterway or a railroad. Height differences between the roads can require an interchange to connect them. Notice that most of them become 2-quadrant parclo interchanges, single quadrant interchanges, or partial Y interchanges. Here are some examples:

Note: To be a serendipitous interchange in most cases, the interchange must not be needed due to traffic volumes. In these cases, an ordinary intersection would have done the job except for the interference of grade differences or railroad crossings.

LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Florence ININ 156 @ IN 101Half single quadrant Florence IN IN 101 on Ohio River dam
Grade difference
Mauckport ININ 11 @ IN 135Single quadrant Mauckport IN Ohio River bridge
Grade difference
Rockport ININ 66 @ US 231Folded Diamond Rockport IN Ohio River bridge
Grade difference
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Yankeetown ININ 66 @ Old IN 66Folded Diamond Yankeetown IN Existing railroad bridge
East Mount Carmel ININ 64 @ cy 965WKitbashed trumpet E Mt Carmel IN Existing railroad bridgeUses another road for some turns.
Silverwood ININ 234 @ Silver Island RdKitbashed folded diamond Silverwood IN Wabash River bridgeIncludes multiple roads
Lafayette INSagamore Pw
@ Happy Hollow Rd		Folded diamond Lafayette IN 1 Wabash River bridge approachOld US 52
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Lafayette INSagamore Pw
@ 9th St
(left)		Single quadrant Lafayette IN 2 & 3 Railroad overpassOld US 52
Ramp is vertical street at left in image
Lafayette INSagamore Pw
@ Conservation Club Rd
(right)		 Folded diamond Railroad overpassOld US 52
Logansport ININ 25 @ Old IN 25Half single quadrant Logansport IN Railroad bridgeForced by railroad
Peru INUS 31 @ Bus US 24Single quadrant Peru IN 1 Railroad bridgeForced by railroad
Some turns must take other roads
Elliston INUS 231 In 54 @ River RdSingle quadrant Elliston IN 1 White River bridge
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Indianapolis INRaymond St @ West StKitbashed trumpet Indianapolis IN 1 White River and railroad bridge
Indianapolis INWashington St
@ White River Pw		 Half single quadrant Indianapolis IN 2 White River bridge & railroadAvoids both with grade change
Indianapolis IN38th St
@ White River Pw West
(left)		 Folded Diamond Indianapolis IN 3 & 4 White River bridge
Indianapolis IN38th St
@ White River Pw East
(right)		 Partial Y White River bridgeArt exhibit inside ramp
Indianapolis INMadison Ave
@ Morris St		Kitbashed cloverleaf Indianapolis IN 5 Railroad bridgeGrade change
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Bloomington IN Vernal Pk (horizontal)
@ Industrial Park Dr (bottom)
& Packinghouse Rd (top)		 Single quadrant Bloomington IN Close Freeway OverpassGrade change
Smithville IN Old 37
@ Smithville Rd (right)
& Ketcham Rd (left)		 Dual single quadrant Smithville IN Creek bridge between Ketcham Rd and Smithville Rd (the jog) Grade change
Creek bridge built after Old 37
Bremen INUS 6 @ IN 331Single quadrant Bremen IN US 6 built on leveeGrade change
River Haven INMaplecrest Rd
@ Nelson Rd		Single quadrant River Havenb IN Within railroad yardGrade change
LOCATIONINCLUDED ROADSINTERCHANGE TYPE IMAGE REASON BUILTCOMMENTS
Winchester INUS 27 @ IN 32Folded diamond Winchester IN Railroad bridge
Muncie ININ 32 @ Tillotson AvSingle quadrant Muncie IN White River bridge & Railroad bridge
Daleville ININ 32 @ I-69 & IN 67Folded Diamond Daleville IN Between White River bridge & Railroad bridge Rebound interchange using frontage roads
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Highland ININ 63 @ US 36Folded Diamond Highland IN Railroad bridge
Kokomo INUS 35 @ Davis RdPartial Y Kokomo IN Railroad bridge
Logansport INUS 35 @ IN 25Folded Diamond Lognsport IN Railroad bridge
Colburn ININ 25 @ cy 900 ESingle quadrant Colburn IN Railroad bridge
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Buck Creek ININ 25 @ cy500 ESingle Quadrant Buck Creek IN Railroad bridge
Gravel Hill INUS 52 @ US 41Partial Y Gravel Hill IN Railroad bridge
Ogden Dunes INCrisman Rd @ US 12
(bottom)		Folded Diamond Ogden Dunes IN Railroad yard bridge
Ogden Dunes INCrisman Rd
@ Boundary Rd
(top)		 Folded Diamond Railroad yard bridge
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
East Chicago INUS 12 @ Kennedy AvFolded Diamond East Chicago IN Railroad yard bridge
English ININ 64 @ IN 37Folded Diamond English IN Bird Hollow Creek valley bridgeGrade difference
Columbus INUS 31 @ Indianapolis RdPartial Y Columbus IN Railroad bridgeGrade difference
Intersections within interchange
Harrodsburg ININ 37 @ Monroe Dam Rd
(right)		Folded diamond Harrodsburg IN Railroad bridgeGrade difference
Harrodsburg ININ 37 @ Old 37
(left)		Half single quadrant Railroad bridgeGrade difference
Used to be folded diamond
LOCATIONINCLUDED ROADSTYPE IMAGE REASON BUILTCOMMENTS
Indianapolis IN Massachusetts Av
@ 30th St
&Emerson Av		Single quadrant Indianapolis IN 6 Railroad bridgesGrade difference
Stanford IN I-69 @ Burch RdSingle quadrant Stanford IN Freeway overpass Special emergency-vehicle Interstate highway access - Fire jurisdiction has no interchange.

Locked gate allows only official vehicles.

Contact me if you know of any Indiana serendipitous interchange I missed. Email address distorted to stop spam robots:

midimagic at sbcglobal dot net