January 1 2021123456Crash Location Verification Status Dashboar5 AASHTO Controlling Elements AASHTO criteria required documentation and mitigation strategies for the controlling elements is provided i ID: 887769
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1 January 1, 2021 1 2 3 4 5 6 ��
January 1, 2021 1 2 3 4 5 6 ��Topic #625000002FDOT Design Manual��122 – Design Exceptions and Design Variations(5)Review and eval
2 uation of the most recent 5 years of cra
uation of the most recent 5 years of crash data from the currentdate of analysis.(6)Background information which documents or justifies the request.For Lateral Of
3 fset Design Variations, provide a tabula
fset Design Variations, provide a tabulation of stations (or mileposts) and lateral offsets for aboveground fixed objects.Additionalinformation can be found on th
4 e Crash Location Verification Status D
e Crash Location Verification Status Dashboar . .5 AASHTO Controlling Elements AASHTO criteria, required documentation, and mitigation strategies for the contr
5 olling elements is provided in the follo
olling elements is provided in the following sectionsDetailed discussions on criteria and mitigation are provided in the AASHTO GreenBookA Policy on Geometric Des
6 ign of Highwaysand Streets, 2011, and th
ign of Highwaysand Streets, 2011, and theFHWA Guide Mitigation Strategies for Design Exceptions, July 2007 The AASHTO criteria provided arein no way intended to
7 replace Department design criteria. he
replace Department design criteria. he criteria used for determining Design Exceptions on Interstate projects must be based on AASHTO’s A Policy on Design S
8 tandards Interstate System 20 7 8 9 10 1
tandards Interstate System 20 7 8 9 10 11 12 13 14 15 16 ��Topic #625000002FDOT Design Manual��122 – Design Exceptions and Design
9 Variations.5.5Mitigation Potential miti
Variations.5.5Mitigation Potential mitigation strategies for superelevation rate exceptions are: (1)o provide advanced warning(a)Signing(b)Pavement marking messa
10 ges(c)Dynamic curve warning systems(2)o
ges(c)Dynamic curve warning systems(2)o provide delineation(a)Chevrons(b)Linear Barrielineators(c)Tubular Markers(3)o improve the ability to stay within the lane(
11 a)Widen the roadway(b)Skidresistant pave
a)Widen the roadway(b)Skidresistant pavement(c)Enhanced pavement markings(d)Lighting(e)Audibleand vibratory treatment, (See FDM 210.4.6for arterials andcollectors
12 . See FDM 211.4.4for LA Facilities.)(4)
. See FDM 211.4.4for LA Facilities.)(4)o improve the ability to recoverif driver leaves the lane(a)Paved or partially paved shoulders(b)Safety edge(5)o reduce th
13 e crash severity if driverleaves the roa
e crash severity if driverleaves the roadway: (See FDM(a)Remove or relocate fixed objects(b)Traversable slopes(c)Breakaway safety hardware(d)Shield fixed objects
14 and steep slopes 17 18 19 20 21 �
and steep slopes 17 18 19 20 21 ��Topic #625000002FDOT Design Manual��122 – Design Exceptions and Design Variations.5.8Documentat
15 ion rovide a proposal for handling drain
ion rovide a proposal for handling drainage and details on how the cross-slopeimpacts intersections. .5.8Mitigation Potential mitigation strategies for deficient
16 cross slope are: (1)Signing to provide w
cross slope are: (1)Signing to provide warning of slick pavement(2)o improve surface friction(a)Pavement grooving (PCC Pavement)(b)Opengraded friction courses(HMA
17 pavement)(3)o improve drainage(a)Transv
pavement)(3)o improve drainage(a)Transverse pavement grooving (PCC Pavement)(b)Opengraded friction courses (HMA pavement)(c)Pavement edge drains(d)Modified shoul
18 der cross slope to mitigate crossslope b
der cross slope to mitigate crossslope break on the high sideof superelevated curves. 22 ��Topic #625000002FDOT Design Manual��122
19 50; Design Exceptions and Design Variati
50; Design Exceptions and Design Variations.5.9 Vertical Clearance .5.91 AASHTO CriteriaTable 122AASHTO Vertical Clearance (Minimum) Type Facility Vertical Cleara
20 nce (feet)(2) AASHTO Freewayspg. 84, Ar
nce (feet)(2) AASHTO Freewayspg. 84, Arterials(New Structures): RuralUrban(1)(1)pg. 76, 10pg. 738, 10 Arterials (Existing Structures): RuralUrbanpg. 7-7, 10pg. 7
21 38, 10 Other Highwayspg. 58, 8-4 Sign T
38, 10 Other Highwayspg. 58, 8-4 Sign Trussespg. 7-7,38, 8-4 Pedestrian Overpasspg. 7-7,38, 8-4 Tunnels:FreewaysOther Highwayspg. 4pg. 4 Railroads(3)pg. 10 Not
22 es:14 feet allowedin highlydeveloped urb
es:14 feet allowedin highlydeveloped urban areas if alternate route has 16 feet.An allowance of 6 inches should be added to vertical clearance to accommodate futu
23 re resurfacingee FDM 220.3.and the lates
re resurfacingee FDM 220.3.and the latest version of American Railway Engineering and Maintenanceof-y Association (AREMA)guidelines, or the design office of the h
24 igh speed rail line ofinterest for speci
igh speed rail line ofinterest for specific high speed guidelines and specifications. Over Electrified Railroad, theminimum verticalclearance is 24 feet 3 inches
25 . (See Topic No. 000725003: South Flori
. (See Topic No. 000725003: South Florida RailCorridor Clearance.)esign Exceptions to the 16ft vertical clearance standard on rural Interstate routes or on a sin
26 glnterstate route throughurban areas mus
glnterstate route throughurban areas must be coordinated with Srface Deployment and DistributionCommand Transportation Engineering Agency (SDDCTEA) as described i
27 nFDM 122.5.9.2 .5.9Documentation A writ
nFDM 122.5.9.2 .5.9Documentation A written evaluation of the vertical clearance deficiency and recommendation by the State Office of Maintenance is required and
28 should be attached to all Vertical Clear
should be attached to all Vertical Clearance Variations and Exceptions. 23 ��Topic #625000002FDOT Design Manual��122 – Design Exc
29 eptions and Design Variationsrovide loca
eptions and Design Variationsrovide locations of alternative routes that meetcriteria. For Interstate Projects, the District is responsible for completing an Int
30 erstate Vertical Clearance Exception Co
erstate Vertical Clearance Exception Coordination form, for Design Exceptions to vertical clearance quirements above interstate facilities (mainlines and ramps)
31 . The District will submit the form to
. The District will submit the form to the Surface Deployment and Distribution Command Transportation Engineering Agency (SDDCTEA) via email for approval, copyin
32 g the FHWA Florida Division. Allow for
g the FHWA Florida Division. Allow for 10 working days after SDDCTEA receipt for action before requesting notification of disposition (via email or fax). A copy
33 of the approval must be provided with t
of the approval must be provided with the Design Exception. A request for coordination must take place before the District Design Engineer can recommend theDesi
34 gn Exception. .5.9Mitigation Potential m
gn Exception. .5.9Mitigation Potential mitigation strategies for vertical clearanceare:(1)Signing to provide advance warning(2)o preventimpacts with low structure
35 s(a)Alternate routes(b)arge vehicle rest
s(a)Alternate routes(b)arge vehicle restrictions(c)Bridge Jacking may be a consideration to address bridges with minordeficiencies. 24 25 26 27 28 29 30 31 32 33