Two-Lane, Two-Way Roads

Transcription

1 Two-Lane, Two-Way Roads road consisting of two opposing lanes of undivided traffic. Two-Lane Two-Way *Drawings Not To Scale mndot.gov/fieldmanual

2 Field Manual January 08 Intermediate Volume Up to 00 DT TWO-LNE, TWO-WY RODS MOBILE Minutes Less Lane Closure SHORT DURTION Hour Less SHORT TERM Hours Less Flagger Control 6* * STOP Sign Control Wk in Center of Road 7* ll DTs Wk Vehicle Parked on Shoulder MOBILE Minutes Less SHORT DURTION Hour Less SHORT TERM Hours Less 6 8 Wk on Shoulder 9 8 Wk off Shoulder 8 Wk off Roadway 0 Shoulder Parking Lane Closure Partial Shoulder Closure f Trailer Mounted Devices Lane Closure, * Flagger Control 6* Moving Wk Spaces 7* Near Intersection 0*, * Near Railroad Xing * Pilot Car Operation 8* Flagging Crossroads and Blind Curves utomated Flagger ssistance Device (FD) Ptable Signal Control Flagging Station Enhancements Wk in Center of Road 8* Lane Shift 9 Turn Lane Closures, Tempary Road Closure ( minute intervals) Tempary Road Closure Sidewalk Closure 88, 89 Bike Lane Closure 87 ravel Road Maintenance 0 Crossroad and Confirmation Signing * 8 7 9* * INTERMEDITE TERM Days Less INTERMEDITE TERM Days Less See Low Volume Roads section f DTs less than 00. * This layout may be used f nighttime operations only if the flagging stations are occupied and illuminated with ptable lights. 6K-

3 Field Manual January 08. The Wk Vehicle should be pulled over as far off the roadway as possible, and shall display and operate a 60-degree flashing beacon. Wk Vehicle WORK VEHICLE PRKED ON SHOULDER HOUR LESS LYOUT 6 6K-6

4 Field Manual January 08 Type B channelizing devices shall be used in the shoulder taper regardless of the location on the shoulder the width of the shoulder. Trailer mounted traffic control devices should be placed at least feet from the traveled lane. If a foot clearance cannot be met, then the taper length shall be doubled. foot clearance Number of Devices Taper Length (feet) Speed Limit (mph) PRTIL SHOULDER CLOSURE Trailer Mounted Devices on Shoulder DYS LESS LYOUT 7 6K-7

5 Field Manual January 08 The ROD WORK HED sign may be omitted f sht term daylight operations if a vehicle is displaying and operating a 60-degree flashing beacon and: a. The distance from curb face to the wk space is at least feet, b. The distance from the edge of the roadway to the wk space is at least feet. This ROD WORK HED sign shall be installed on two-lane, two-way roads if traffic control devices are installed f a wk space in the opposite shoulder. If this layout is used to close a parking lane that is nmally open to vehicle travel during the time of day the closure will be in effect, the lane shall be considered a traveled lane and not a parking lane. Layout shall be used to provide traffic control f the lane closure.. If this layout is used to close a parking lane, channelizer spacing may be reduced from to in high volume areas. SEE NOTE OPTIONL END TPER L/ OPTIONL WORK OFF SHOULDER WORK ON SHOULDER SHOULDER ND PRKIN LNE CLOSURE DYS LESS Wk On Near Shoulder LYOUT 8 6K-8

6 Field Manual January 08 ny Shadow Vehicle Protection Vehicle operating totally partially in a traffic lane should be equipped with a TM. The Shadow Vehicle Protection Vehicle may encroach into the traffic lane when the shoulder is too narrow to drive on.. ny vehicle not displaying a Flashing rrow Board shall display high-intensity rotating, flashing, oscillating, strobe lights. The PCMS shall be used f nighttime operations. When the PCMS is used, the SHOULDER CLOSED NO SHOULDER sign becomes optional. 66 The distance between the wk area and the Shadow Vehicle should be adjusted between R and F based on traffic volume and sight distance. Wk Vehicle OPTIONL R minimum F maximum 6 Shadow Vehicle Variable OPTIONL SHOULDER CLOSURE HOUR LESS Mobile and Sht Duration LYOUT 9 6K-9

7 Field Manual January 08 Shadow Vehicle should be used on roadways where Decision Sight Distance (D) is frequently restricted and the equipment consistently encroaches within feet of the traffic lane. The Shadow Vehicle may be omitted on roadways with speeds limits of 0 mph less. On roadways of less than 00 DT the Shadow Vehicle and ROD WORK HED sign may be omitted. The vehicle should be as far off the roadway as possible, and shall display and operate a 60-degree flashing beacon. The ROD WORK HED sign may be omitted when there is an adequate approach Decision Sight Distance (D) to the equipment along the majity of the route. When advance warning signs are used, the signs should be no me than miles from the equipment. The location of the signs should be determined by the sources of traffic, such as maj cross roads. If the distance is mile greater, a XX MILES distance plaque should be used and placed directly below on the lower side of the warning sign nearest traffic. 66 The Shadow Vehicle should be equipped with a TM if it encroaches into the traffic lane. Required f all slow moving vehicles. F Optional Shadow Vehicle 6 OPTIONL WORK OFF RODWY Mobile Operations Having Little No Interference with Traffic MINUTES LESS LYOUT 0 6K-0

8 Field Manual January 08. If the approach sight distance is restricted, a spotter should be used.. If the visibility is po the operation does not move at least the Decision Sight Distance (D) every minutes, the appropriate stationary layout should be used.. This layout may be used f nighttime operations only in locations where the posted speed limit is 0 mph less. The slow moving stopped Wk Vehicle should keep the traffic lane as wide as possible by using the shoulder space whenever possible. ONLY FOR RODS LESS THN 00 DT LNE CLOSURE TWO-LNE, TWO-WY ROD MINUTES LESS LYOUT 6K-

9 Field Manual January 08. Use Layout under any of the following conditions: If the wk space is not visible f at least the Decision Sight Distance (D), The motists cannot see beyond the wk space, Traffic volumes do not allow passage. ny Shadow Vehicle Protection Vehicle operating totally partially in a traffic lane should be equipped with a TM.. If the wk space does not move at least the Decision Sight Distance (D) every minutes, the appropriate stationary layout should be used.. This layout may be used f nighttime operations only in locations where the posted speed limit is 0 mph less. F nighttime operations, the Flashing rrow Board shall be used. 66 The slow moving stopped Wk Vehicle and Shadow Vehicle should keep the traffic lane as wide as possible by using the shoulder space whenever practical. 77 The distance between the wk area and the Shadow Vehicle should be adjusted between R and F based on traffic volume and sight distance. Wk Vehicle 6 R minimum F maximum 7 Shadow Vehicle LNE CLOSURE With Random Wk reas TWO-LNE, TWO-WY ROD MINUTES LESS LYOUT 6K-

10 Field Manual January 08. The advance warning signs should be moved reset after each maj road intersection after each mile whichever comes first. ny Shadow Vehicle Protection Vehicle operating totally partially in a traffic lane should be equipped with a TM. The slow moving stopped Wk Vehicle(s) and Shadow Vehicle should keep the traffic lane as wide as possible by using the shoulder space whenever practical.. If the wk area does not move at least the Decision Sight Distance (D) every minutes, the appropriate stationary layout should be used.. This layout may be used f nighttime operations only in locations where the posted speed limit is 0 mph less. 66 The Shadow Vehicle with Flashing rrow Board shall be used during nighttime operations. 77 The Flagger, Flagger head sign, and ONE LNE ROD HED sign may be omitted when traffic is not being directed over the center line by the other flagger Minimum lane widths shall be 0 feet of driveable surface. 7 up to mile maximum 7 00 feet minimum Wk Vehicle(s) OPTIONL Shadow Vehicle 6 R minimum 6 OPTIONL 0 feet minimum up to mile maximum 7 LNE CLOSURE With a Moving Wk rea TWO-LNE, TWO-WY ROD MINUTES LESS LYOUT 6K-

11 Field Manual January 08 pproach signs are the same in both directions. STOP signs shall be 8 x 8 inches. The left-side STOP sign may be 0 x 0 inches. If adequate sight distance is not available to recognize a stopped vehicle traffic volume restricts vehicles from taking turns through the open lane, use Layout 6. The ONE LNE ROD HED sign may be omitted when the posted speed limit is 0 mph less. The two-way taper should be 0 feet in length using equally spaced channelizing devices. F F 0 feet 00 feet maximum 00 feet maximum F - Type Red Flashing Warning Light F 0 feet F OPTIONL LNE CLOSURE WITH STOP SINS DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

12 Field Manual January 08 The approach sight distance to the flagger shall be at least the Decision Sight Distance (D). If the flagger s ability to see oncoming motists beyond the wk space is less than the Decision Sight Distance (D), two flaggers shall be used - See Layout 6. The ONE LNE ROD HED sign may be omitted when the posted speed limit is 0 mph less.. If the wk space must be left unattended at night use Layout. The two-way taper should be 0 feet in length and using equally spaced channelizing devices. 00 feet maximum B OPTIONL LNE CLOSURE, ONE FLER DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

13 Field Manual January 08 The approach sight distance to the flagger shall be at least the Decision Sight Distance (D). The ONE LNE ROD HED sign may be omitted when the posted speed limit is 0 mph less. The two-way taper should be 0 feet in length using equally spaced channelizing devices.. If anticipating operational problems, the use of a Pilot Car (see Layout 8) may improve operations and safety. OPTIONL up to mile maximum 00 feet B up to mile maximum LNE CLOSURE, TWO FLERS DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6 6K-6

14 Field Manual January 08. This layout shall be used with the appropriate flagger layout to select the location of additional required traffic control devices.. This layout may be used f sht term stationary traffic control zones that cover a relatively long segment of highway in a sht period of time but do not meet the requirements f a mobile traffic control zone. It is intended to be used Time to eliminate the multiple Period movement of signs along a crid. mile. The maximum distance allowed f this layout is D miles. t no time will there be me than mile between Flagger head signs. OPTIONL C mile mile Time Period B See Layout f required placement of advance warning signs on crossroads. Time Period Signs Displayed Signs Not Displayed C & B & D C & B & D B & D & C mile Time Period OPTIONL MOVIN WORK SPCES HOURS LESS LYOUT 7 6K-7

15 Field Manual January 08 The approach sight distance to the flagger shall be at least the Decision Sight Distance (D). The ONE LNE ROD HED sign may be omitted when the posted speed limit is 0 mph less. Channelizing devices along the edge of the wk space may be omitted unless traffic is traveling next to longitudinal drop-offs that are greater than inches. Pilot Cars should lead traffic through the wk zone at a safe speed. See the Flagging Handbook f additional guidance. dvance warning signs are the same f both directions approaching the wk area. 66 The two-way taper should be 0 feet in length using equally spaced channelizing devices. 7. See Layout 9 f additional considerations if there are crossroads. 00 feet 6 B 6 up to mile maximum OPTIONL LNE CLOSURE, PILOT CR METHOD DYS LESS TWO-LNE, TWO-WY ROD LYOUT 8 6K-8

16 Field Manual January 08 See Layout 6 f advance signing and flagger setup. pproach signs are the same in both directions. When a flagger is positioned at an intersection, they: Shall have -way communications with the Pilot Car, Should use hand signals with a flag flashlight with red glow cone to control traffic movements rather than the typical STOP/SLOW paddle in der to avoid displaying the SLOW paddle to the opposite approach, and May need additional flaggers to direct traffic when the crossroad consistently has multiple vehicles per direction waiting each Pilot Car cycle. flagger may be placed at a blind curve, crest of a hill, other site obstruction where traffic might enter from other driveways entrances to warn the Pilot Car that there may be oncoming traffic. When used, the flagger: Shall be located to clearly see traffic from both directions, Shall not be positioned in the open traffic lane, Shall have -way communications with the Pilot Car, Shall have a flagger paddle; and Should have a means to warn an errant driver such as an air hn.. Consider distributing brochures to local businesses and residents detailing Pilot Car operations. PILOT CR FOLLOW ME sign shall be mounted on the Pilot Car. 66 Channelizers shall be placed near intersections and flagging stations. 77 Layout 8 indicates which channelizers are optional with Pilot Car operations. FLIN CROSSRODS ND BLIND CURVES PILOT CR OPERTIONS DYS LESS LYOUT 9a LYOUT 9a & b 6K-9a

17 Field Manual January 08 ST 6 6 Blind Curve Crest of Hill 7 Local ccess Road FLIN CROSSRODS ND BLIND CURVES PILOT CR OPERTIONS DYS LESS LYOUT 9b LYOUT 9a & b 6K-9b

18 Field Manual January 08 The spacing between devices should be reduced to less when the wk space is within 00 feet of the intersection. This will help keep motists from entering into the wk space near the intersection. The ONE LNE ROD HED sign may be omitted when the posted speed limit is 0 mph less.. When the traffic volume of the min roadway exceeds 00 DT turning movements cause unsafe operations, the following steps should be considered: a. Control traffic at the intersection with a law enfcement officer; b. Restrict vehicle turns from the maj roadway with flagging, signing, and/ closing the turn lanes; c. Completely close a leg of the min roadway until the wk space has left the area near the intersection. F other tempary traffic control devices in advance of the wk space, see Layouts,, 6. OPTIONL MJOR RODWY Inplace Sign MINOR RODWY Inplace Sign OPTIONL LNE CLOSURE ON MINOR ROD Befe Intersection of Maj Road DYS LESS TWO-LNE, TWO-WY ROD LYOUT 0 6K-0

19 Field Manual January 08 When the wk space is located between and beyond a controlled intersection, the nmal sign and buffer spacing in the approach area may be reduced during daylight operations. The Flagger head sign should be centered between the flagger station and the intersection. The ONE LNE ROD HED sign may be omitted when the posted speed is 0 mph less.. When the traffic volume of the min roadway exceeds 00 DT turning movements cause unsafe operations, the following steps should be considered: a. Control traffic at the intersection with a law enfcement officer; b. Restrict vehicle turns from the maj roadway with flagging, signing, and/ closing the turn lanes; c. Completely close a leg of the min roadway until the wk space has left the area near the intersection. F other tempary traffic control devices in advance of the wk space, see Layouts,, 6. The two-way taper should be 0 feet in length using equally spaced channelizing devices. OPTIONL MJOR RODWY Inplace Sign to MINOR RODWY Inplace Sign OPTIONL LNE CLOSURE ON MINOR ROD Beyond Intersection of Maj Road DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

20 Field Manual January 08. Users of this layout shall codinate with the railroad.. If the backup of vehicles across active railroad tracks cannot be avoided, a law enfcement officer a flagger shall be provided at the crossing to prevent vehicles from stopping within the railroad crossing even if automatic warning devices are in place. The approach sight distance to the flagger shall be at least the Decision Sight Distance (D). OPTIONL 00 feet 6. The activity area should be extended beyond the railroad crossing so that the backup of traffic created by the flagging operation will not extended across the railroad crossing The ONE LNE ROD HED sign may be omitted when the posted speed limit is 0 mph less. 66 The two-way taper should be 0 feet in length using equally spaced channelizing devices. 77 Channelizing devices shall not be placed within 8 feet on either side of the railroad track. Inplace Extended Buffer Space 7 Inplace 6 OPTIONL LNE CLOSURE NER RDE CROSSIN DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

21 Field Manual January 08 The flagger may be equipped with an airhn. The STOP/SLOW paddle may be enhanced with flashing conspicuity lights on the signs. The Flagger head sign may be enhanced with flashing conspicuity lights on it. Keep Right signs and Type channelizing devices such as weighted channelizers, cones, tubular markers, centerline delineats are optional. The ptable rumble strips array should consist of strips placed perpendicular to the direction of travel. Spacing of rumble strips should be from center of rumble to center of rumble and based on the posted speed limit: 0 mph less = 0 feet spacing to mph = feet spacing 60 mph greater = 0 feet spacing The rumble strips shall be white, black, ange. 0 ft OPTIONL x 8 inches OPTIONL / OPTIONL Ptable rumble strips OPTIONL OPTIONL FLIN STTION OPTIONS DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

22 Field Manual January 08. The approach sight distance to the utomated Flagging ssistance Device (FD) shall be at least the Decision Sight Distance (D). The ONE LNE ROD HED sign may be omitted when the posted speed limit is 0 mph less. The two-way taper should be 0 feet in length using equally spaced channelizing devices. When using a single operat, they shall be located so they can see traffic at both FD locations. Use the appropriate sign on the FD. OPTIONL up to mile maximum FD x 8 inches 00 feet Operats B x 8 inches OPTIONL 0 feet FD up to mile maximum LNE CLOSURE, UTOMTED FLERS DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

23 Field Manual January 08 pproach signs are the same in both directions.. Signal timing and signal head locations shall be established by qualified personnel and approved by the road authity. Two signal heads shall be installed per approach. The first shall be installed on the right shoulder. The second signal head may be installed on either the left shoulder mounted overhead on the same structure as the first signal head. OPTIONL x 8 inches 00 feet 00 feet L/ B L/ 00 feet x 8 inches OPTIONL OPTIONL OPTIONL OPTIONL LNE CLOSURE WITH PORTBLE SINLS DYS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

24 Field Manual January 08. The Wk Vehicles shall not be parked on the shoulder opposite of the coned area. The Flagger and Flagger head sign may be omitted when traffic volumes do not restrict the ability of traffic to regulate itself through the length of the wk space. The two-way taper should be 0 feet in length using equally spaced channelizing devices. 0 feet maximum B EQUIPMENT IN TRFFIC LNE HOUR LESS TWO-LNE, TWO-WY ROD LYOUT 6 6K-6

25 Field Manual January 08 The Wk Vehicle shall be parked off of the roadway. Do not obstruct the shoulder in the coned areas. The Flaggers and the Flagger head signs may be omitted if the posted speed limit is 0 mph less and there is at least 0 feet of driveable surface outside of the channelizing devices. The flagger shall be visible f at least the Decision Sight Distance (D). The Keep Right sign may be omitted if the posted speed limit is 0 mph less. x 8 inches L/ Use shoulder, ditch, field entrance L/ B B 0 feet maximum L/ L/ x 8 inches EQUIPMENT ON CENTERLINE HOUR LESS TWO-LNE, TWO-WY ROD LYOUT 7 6K-7

26 Field Manual January 08 The Flaggers and the Flagger head signs may be omitted if the posted speed limit is 0 mph less and there is at least 0 feet of driveable surface outside of the channelizing devices. Parking and stopping should be prohibited along the wk area and tapers. The flagger shall be visible f at least the Decision Sight Distance (D). The Keep Right sign may be omitted if the posted speed limit is 0 mph less. ROD WORK HED OPTIONL x 8 inches L/ L/ B B L/ L/ x 8 inches OPTIONL WORK SPCE IN CENTER OF ROD HOURS LESS TWO-LNE, TWO-WY ROD LYOUT 8 6K-8

27 Field Manual January 08 Parking and stopping should be prohibited along the wk area and tapers. Minimum lane widths shall be 0 feet of driveable surface. When tempary lane widths are less than existing lane widths a LNES NRROW sign a Narrow Lane (width shown) sign with advisy plaque placed directly below on the lower side of the warning sign nearest traffic should be used. The Double Reverse Curve, Reverse Curve, and/ Keep Right signs may be omitted when the posted speed limit is 0 mph less. If tangent length of activity area is 600 feet less, use the Double Reverse Curve sign. OPTIONL x 8 inches W- W-R L/ L/ B L/ 00 feet B L/ OPTIONL x 8 inches L/ W- W-L WORK SPCE OCCUPIES ONE HLF OF ROD DYS LESS TWO-LNE, TWO-WY ROD LYOUT 9 6K-9

28 Field Manual January 08. Mot raders shall be equipped with operating vehicle warning lights visible f 60 degrees around the vehicle at a minimum height of / feet and a radius of 60 feet greater.. Mot rader blade end(s) may be marked with red ange flags to provide additional warning and make the equipment me visible to passing vehicles. The ROD WORK HED signs may be omitted when there is an adequate approach Decision Sight Distance (D) to the Mot rader along the majity of the route. When advance warning signs are used, the signs should be no me than miles from the Wk Vehicle. The location of the signs should be determined by the sources of traffic, such as maj cross roads. Required f all slow moving vehicles operating on public roadways. RVEL ROD MINTENNCE rading Operations TWO-LNE, TWO-WY ROD HOURS LESS LYOUT 0 6K-0

29 Field Manual January 08. Road authity shall be contacted pri to closure.. If the volume is less than 00 DT, traffic control devices may be substituted with law enfcement.. Traffic should not be stopped f intervals of greater than minutes. The BE PREPRED TO STOP sign may be omitted when the posted speed limit is 0 mph less. 0 feet 0 feet TEMPORRY ROD CLOSURE HOURS LESS TWO-LNE, TWO-WY ROD LYOUT 6K-

30 Field Manual January 08. The road authity shall be contacted pri to closure. The road authity may provide requirements related to sign placement, detours, emergency services, etc. Road Closure Notice sign should be installed in advance (timewise) as required by the road authity. Install Type III barricade at the last driveway intersection beyond which there is no public access. Barricade shall span the entire roadway including traversable shoulders.. Road user safety and usability must be maintained up to the full closure. ROD CLOSED TO THRU TRFFIC barricade assembly may be placed on the center line; stripes on barricade shall slope downward toward the appropriate traffic direction (f both directions of the roadway). 66 DED END sign shall be used only when there is a dead end and there are no alternate through routes past this point. 77 NO OUTLET sign shall be used only when there are no outlets and there are no alternate through routes past this point. B Min Road Driveway with No Outlet s appropriate. 6 7 OPTIONL ROD CLOSURE DYS LESS LYOUT 6K-

31 Field Manual January 08. Contact the appropriate road authity f signal timing modifications befe beginning wk at any signalized intersection. Optional R-, R-, R-8 signs may be placed on sign stand top of barricades on side closest to traffic. Signs are required if turns are prohibited. OPTIONL OPTIONL R-8 R- R- L/ L/ Divided Roads ll Roads TURN LNE CLOSURES DYS LESS LYOUT 6K-

32 Field Manual January 08. Contact the appropriate road authity f signal timing modifications befe beginning wk at any signalized intersection. Optional R- R-8 signs may be placed on sign stand top of barricades on side closest to traffic. Signs are required if turns are prohibited. R- R-8 R- R-8 DYS LESS LEFT TURN LNE CLOSURE TWO-LNE, TWO-WY MULTI-LNE UNDIVIDED ROD LYOUT 6K-

33 Field Manual January 08. This layout should be used f those stationary tempary traffic control zones that extend over a relatively long segment of roadway.. The appropriate layout shall be used f the active wk space (such as resurfacing operations, area of paving, etc). Confirmation signing f a continuous condition should be placed after every intersection and approximately mile spacing f speeds mph greater, / mile spacing f speeds 0 mph less. Use the appropriate advance warning sign f the roadway condition, i.e. ROOVED PVEMENT, LOOSE RVEL, ROUH ROD. n advisy Motcycle plaque may be placed directly below on the lower side of the warning sign nearest traffic if the warning is directed primarily to motcyclists.. Consider delineating raised structures (manhole covers, etc.) ROD WORK HED LOW SHOULDER LOW SHOULDER ROD WORK HED ROD WORK HED LOW SHOULDER LOW SHOULDER LOW SHOULDER LOW SHOULDER ROD WORK HED ROD WORK HED LOW SHOULDER LOW SHOULDER ROD WORK HED CROSSROD & CONFIRMTION SININ DYS LESS Traffic Control Zone LYOUT 6K-