UNCURBED INTERSECTIONS APPROACH TREATMENT DETAIL I

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Lesley Boyd
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1 UNCUBED INTESECTIONS MINIMUM PAVED APON Paved shoulder Paved as per plans APPOACH TEATMENT DETAIL I EX adius Gravel oad Hinge Line EX adius Hinge Line 25' Taper (7.5m) 2' (0.6m) MIN Width 25' Taper (7.5m) 2' (0.6m). Adjust radius & width to obtain 2' (0.6m) from shoulder hinge line, as indicated. APPOACH TEATMENT DETAIL II 30' (9m) or To Springpoint 30' (9m) 2' (0.6m) Hinge Line GEOMETIC DESIGN GUIDE FO BY: Michigan Department of Transportation ENGINEE OF DELIVEY TAFFIC AND SAFETY DAWN BY: ECH BY: CHECKED BY: IG/JAT ENGINEE OF DEVELOPMENT FILE: PW D TS Geo/mdot traf.dgn EV. 05/03/2017 FLAES AND INTESECTION DETAILS 1 OF7

2 CUBED INTESECTIONS APPOACH TEATMENT DETAIL III MINIMUM PAVED APON Paved shoulder Paved as per plans TYPE 1: MINIMUM CUBED CONNECTION Curbed radii should be used on major collector roads, when gravel accumulation and/or vehicle encroachment is a problem, or when roadside control is desirable. 30' (9m) or as required to accommodate appropriate design vehicle Intersecting oad 10' (3m) Surfacing to Accommodate gutter drainage (TYP all types) Pave intersecting road to curb ending See Typical A on Sht #5 for all Approach Treatment Detail III TYPE 2: IGHT TUN TAPE See Traffic & Safety Note 604A (7.5) for Guidelines See insets Intersecting oad 10' (3m) See Taper Table on Sht 5 Extend to match ex shoulder surfacing MICHIGAN DEPATMENT OF TANSPOTATION TAFFIC AND SAFETY GEOMETIC DESIGN GUIDE FILE: PW D TS Geo/mdot traf.dgn EV. 05/03/ OF

3 CUBED INTESECTIONS APPOACH TEATMENT DETAIL III TYPE 3: IGHT TUN LANE INTESECTING D O STEET See Traffic & Safety Note 604A (7.5) for guidelines 10' (3m) Typical 2 (75m) See Auxiliary Lane Taper Table on Sht 5 Stabilized or paved shoulder TYPE 3 MODIFIED: OFFSET IGHT TUN LANE 10' (3m) Typical INTESECTING D O STEET ecommended at unsignalized intersections with a pattern of crashes involving minor-road vehicles and major-road vehicles, especially where right-turning vehicles may obstruct the minor-road drivers' view of approaching traffic. 2 (75m) 2/3 taper length from Auxiliary 2/3 taper length from Auxiliary Lane Taper Table on Sht #5 Lane Taper Table on Sht #5 Stabilized or paved shoulder TYPE 4: DIECTIONAL PASSING FLAE (2 LANE HIGHWAYS) 225' (70m) 2 (75m) See Auxiliary Lane Taper Table on Sht #5 MICHIGAN DEPATMENT OF TANSPOTATION TAFFIC AND SAFETY GEOMETIC DESIGN GUIDE FILE: PW D TS Geo/mdot traf.dgn EV. 05/03/ OF7

4 TYPE 4 MODIFIED: PASSING FLAE, FO T-INTESECTIONS 225' (70m) 300' (90m) See Auxiliary Lane Taper Table on Sht #5 TYPE 5: TWO TO THEE LANE TANSITION FO CENTE LANE FO LEFT TUNS (IGHT TUN LANE OPTIONAL) \ 2 (75m) Painted Island See Auxiliary Lane Taper Table on Sht #5 W W Thru Lane Shift = L Thru Lane shift = L 2 (75m) THU LANE SHIFT L For Posted Speeds 45 mph (70 kph) or more: For Posted Speeds less than 45 mph (70 kph): L=WS (L=0.62WS) L= WS 2 60 WS 2 (L= 155 ) L= length in feet (meters) S= posted speed in mph (kph) W= offset in feet (meters) TYPE 5: MODIFIED (LEFT TUN LANE), FO T-INTESECTIONS 2 (75m) or to satisfy left turn storage Thru Lane Shift L Thru Lane Shift L W See Insets on Sht #5 MICHIGAN DEPATMENT OF TANSPOTATION TAFFIC AND SAFETY GEOMETIC DESIGN GUIDE FILE: PW D TS Geo/mdot traf.dgn EV. 05/03/ OF

5 CUB ETUN OFFSET DETAILS TYPICAL A TYPICAL FO ALL DETAILS ALTENATE TYPICAL A 10' (3m) 3' (0.9m) Paved Shldr 10' (3m) 3' (0.9m) Paved Shldr 13.5' (4.1m) * * * See Note #6 on Sht #7 ALLOWABLE APPOACH OAD GADES AUXILIAY LANE TAPE TABLE State \ Highway oadway Slope V.C. 200' (60m) +5% -4% V.C. 200' (60m) V.C. 200' (60m) Ex Appr d Ex Appr d Not to be used for transitioning through traffic. The taper rate is the same for both curbed and uncurbed roadways. Posted Speed MPH (kph) ( 60) Taper Ft (m) 75 (23) (60) 100 (30) (70) 130 (40) (80) 180 (55) 55 (90) 225 (70) INTESECTING OAD WITH O WITHOUT SHOULDES INSETS INTESECTING OAD WITH ADDED IGHT TUN LANE 15' 15' 4.5m 4.5m 10' Widen approach road surface to back of curb (3m) 30' (9m) or as recommended by local jurisdiction 75' (23m) 12' 12' 15' 3.6m 3.6m 4.5m 39' (11.7m) Widen approach INTESECTING OAD WITH road surface to back of curb ADDED LEFT TUN LANE Widen approach road surface to back of curb 10' (3m) 12' 12' 15' FILE: PW D TS Geo/mdot traf.dgn 3.6m 3.6m 4.5m 39' (11.7m) MICHIGAN DEPATMENT OF TANSPOTATION TAFFIC AND SAFETY GEOMETIC DESIGN GUIDE EV. 05/03/ OF

6 TABLE OF ADII FO DESIGN VEHICLES SEE NOTE 4 TABLE 1 (*) TABLE 2 (**) TUN FOM OUTSIDE LANE TO TUN FOM OUTSIDE LANE TO OUTSIDE LANE 20' (6m) OUTSIDE LANE DESIGN VEHICLES P SU WB-50 WB-65 ANGLES OF TUN ANGLES OF TUN DESIGN VEHICLES ' (9m) 90' (27m) 30' (9m) 30' (9m) P 30' (9m) 30' (9m) 30' (9m) 40' (12m) SU 30' (9m) 30' (9m) 30' (9m) 80' (24m) 60' (18m) WB-50 40' (12m) 170' (51m) 110' (33m) 80' (24m) WB-65 70' (21m) 60' (18m) Outside lane may include paved shoulder width or curb offset Angle of turn Angle of turn Design vehicles; P=Passenger Car, SU=Single Unit Truck (30' (9m) overall), WB-50=Tractor-Trailer Combination ( wheelbase), WB-65=Interstate Semi- Trailer (65' (19.8m) wheelbase). 2. The angle of intersection between the approach road and the trunkline should not be less than 60 or more than 120, with desirable values between 75 and The above tables are to be used as a guide, turning vehicle templates or AutoTurn should be used for verification. 4. When a state highway intersects a one way approach, in non-turning quadrants the radius shall be a maximum of 10' (3m). 5. On the National Truck Network and Green oute intersections where trucks turn, a WB-65 Interstate Semi-Trailer is the design vehicle. 6. For dual turns - consult the Geometric eview and Congestion Analysis Unit, Division of Operations. MICHIGAN DEPATMENT OF TANSPOTATION TAFFIC AND SAFETY GEOMETIC DESIGN GUIDE FILE: PW D T&S Typ Dev Geom D/GEO650D DevJAT EV. 05/03/ OF7

7 INTESECTION LAYOUTS IA 13.5' (4m) IB Surfacing to accommodate gutter drainage (TYP.) IC ID NOTES: 1. An intersecting road as herein defined may be a city street, county road or state highway. 2. wide lanes are to be used unless conditions require narrower lanes. 3. On horizontal curves, the cross slope on turn lanes should be the same as the through pavement. Where physical constraints do not make this practical the maximum allowable algebraic difference in cross-slope between the turn lane and mainline is 5%, with a desirable maximum of 4%. 4. See Standard Plan -30-Series for curb and gutter details. 5. Clear vision areas should be considered at all intersections. 6. Alternate Typical A may be used when construction and maintenance make the 13.5' (4.1m) curb setback undesirable or the crossroad is curbed. 7. Current AASHTO "A Policy on Geometric Design of Highways and Streets" and MDOT Guidelines should be used for sight distance requirements. 8. See Traffic & Safety Note 614A for guidance on nearside and farside lane drops at intersections. 9. These design concepts are for new construction. Where modification may be needed for retrofitting to existing road features, consult the Geometric eview and Congestion Analysis Unit, Division of Operations. MICHIGAN DEPATMENT OF TANSPOTATION TAFFIC AND SAFETY GEOMETIC DESIGN GUIDE FILE: PW D TS Geo/mdot traf.dgn EV. 05/03/ OF7

BI-DIRECTIONALS FREE-ACCESS

BI-DIRECTIONALS FREE-ACCESS Dimensions may vary depending on design vehicle and turning movements. See GEO-650-Series for addtional details. SPECIAL Special situations, i.e., See Notes 4 & 5 wide streets,