M A Typical Reverse Curve Dallas District Standard for Two-Lane Highway Typical Curve Treatment 8 Edge Line Treatment 1 Curve Signing/Markings witn Intersection : 5 0 : 0 1 2 * 9 1 5 7 0 2 169 / 1 STOP XX M.P.H. 2 / 8 5 * 169 White Edge Line (See #3 from table) Min 0' (Install 6" off edge 5 of pavement) Point of Point of 169 curvature tangent Standard Double *Yellow Stripes ' ' XX 3 9 4 M.P.H. B B s B B er Standard Double d Yellow Stripes ul B * ho B XX S 3 M.P.H. 3 6" White Edge Line White Edge Line 3' Stripe 9' Spacing (See #3 from table) Guidance Edge LIne thru (Install 6" off edge Intersection of pavement) Standard Double Yellow Stripes Note: Reverse curves white edge line See curve safety sequence shown in table shall be on the outside of both curves and shall overlap in the transition area for a minimum of 50'. Curve Safety Sequence Applicable Minimum Measures Advisory Advisory Advisory 169 Curve signing, delineation and pavement markings Speed 55 mph Speed 40-50 speed 35 XX (listed in order from minimum to maximum level of treatment as needed) M.P.H. or higher mph mph or less + + + 1 Advance warning (36" x 36") and advisory mph (18" x 18") + + + 2 Chevron alignment signs if advisory speed is 15 mph or greater than posted speed 3 Edge lines n + + * g Standard Double Yellow Stripes shall be dropped d 3a Pavement width 24' or greater 6" solid white edge line . s 3b Pavement width 20' - 24' 4" solid white edge line through a non-signalized intersection within the g n 3c Pavement width 20' or less no edge line i k city limit. Outside the city limit, the Standard Supplemental Measures r a m # 4 Add shoulders and edge line (see #3a) Double Yellow Strip shall be carried through all - g # 5 Yellow high intensity flourescent chevron alignment signs - add n non-signalized intersections. i reflective sheeting to sign support from bottom edge of sign n g i # # # 6 Large advance warning (48" x 48") and advisory mph (30" x 30") s - # # # 7 Arrow sign (48" x 24") e v # 8 Large arrow sign with diagonals (96" x 36") r u 9 Add flashers to advance warning signs c # - y # # # 10 Surface treatment to improve friction w h ** The W1-1R or L sign shall only be used when the advisory speed is R - OCT-2014 e 30 mph or less Texas Department of Transportation n UPDATED NOTES a l C 2013 - JAN-2016 2 \ NOTE ADDED s d = required TWO-LANE HIGHWAY r + a = optional Notes: SEPT-2016 d # CURVE SIGNING n NOTE ADDED a Applications 4 - 10 are additional supplemental 1. Two methods will be used to determine the appropriate & MARKINGS t FOR STRIPING S applications which may be added as directed by IN CURVE DALLAS DISTRICT STANDARD t the Area Engineer. advisory speed for curves, the GPS Method(existing curves) c i SCALE: NTS SHEET 1 OF 1 r and the Design Method (new curves). MAR-2017 t DESIGN/CK FED.RD. HIGHWAY s FEDERAL AID PROJECT NO. Note: REMOVED DIV.NO. NO. i D "B" - Chevron Spacing REFERENCE BLS \ CHECK 6 M referenced from D&OM(3)-15B TO DELINEATORS SHEET F 2. Notify the Traffic Engineering Section for all requests on STATE DISTRICT COUNTY A BLS NO. R MAY-2019 CHECK T advisory speeds for existing curves. TEXAS DALLAS VARIOUS L MODIFIED FRC A CONTROL SECTION JOB D SIGN SIZE CHECK \ : ARO T.