Standards and Guides for Traffic
Controls for Street and Highway
Construction, Maintenance, Utility,
and Incident Management
Part VI of the Manual on
Uniform Traffic Control Devices (MUTCD)
1988 Edition of MUTCD, Revision 3
Publication No. FHWA-SA-94-027
The following list of editorial changes are issued to help improve the readability of Part VI, provide text clarification and consistency and correct grammatical, typographical and pictorial errors which can be made simply by pen and ink changes:
On page 8, section 6C-2.a Advance Warning Area (1) Urban, delete the second sentence as follows:
Warning sign spacings in advance of the transition area normally range from four to eight times the speed (mph) in feet, with the high end of the range being used when speeds are relatively high.
When single advance warning signs are used (as in the ease of low speed residential streets), the advance warning area can be as short as 200 feet.This needs to be done because if using any speed under 50 mph, a distance smaller than 200 feet is obtained. For example, at 30mph the minimum spacing of four times the speed would be 120 feet.
On page 25, section 6D-2 WORKER SAFETY CONSIDERATIONS, revise the fifth bullet as follows:
Public Information-Improved driver performance may be realized through a well-prepared and complete public relations efforts that covers the nature of the work, the time and duration of its execution,
andits anticipated effects uponon traffic, and possible alternate routes and modes of travel. Such programs have been found to result in a significant drop in traffic; that reduces the possible number of conflicts and may allow a temporary lane closing for additional buffer areaspace.
On page 27, section 6E-4 HAND-SIGNALING DEVICES, revise the third and seventh sentence in the first paragraph to read respectively:
The standard STOP/SLOW sign paddle shall be 18 inches wide and octagonal in shape
squarewith letters at least 6 inches high.
To improve conspicuity, the STOP/SLOW paddles may be
supplementedmodified to incorporate on the STOP face, byone or two symmetrically positioned alternatelyflashing white high intensity lamps on each sidelight(s) on either side of, or above and below the STOP legend. The light(s) may be activated by a demand switch or on/off switch.
- On page 29, in figure VI-4 the flagger with the flag that is depicting "To Alert and Slow Traffic" should not be moving her free hand in an up and down motion. The free hand should be at her side fully extended down. This will agree with the methods of flagger hand signaling on page 28.
- On page 31 move the second paragraph -- "Where the color orange is specified, fluorescent red-orange ...11 to become the second paragraph under 6F. TYPES OF DEVICES.
- On page 62 in figure VI-9 Operating Mode III. add an additional arrow display under the Panel Display column that shows four or more lights in a horizontal direction for the Flashing Caution mode.
On page 66, section 6F-5 d. (1) Vertical Panels, revise the third sentence in the first paragraph to read:
Panel stripe widths shall be 6 inches, except where panel heights are less than 36 inches,
whenthen 4-inch stripes may be used.
On page 67, section 6F-5 f. Barricades (1) Design, revise the second sentence in the third paragraph to read:
The stripes shall be 6-inches wide, except where rail lengths are less than 36 inches,
whenthen 4-inch-wide stripes may be used.
- On page 70, Figure VI-10 Channelizing Devices, the 18-inch Tubular Marker does not need the Retroreflective Band since 18-inch Tubular Markers can not be used at night.
On page 71, section 6F-6 a. MARKINGS, revise number (3) to read:
(3) Markings shall be placed, along the entire length of any surfaced detour or temporary roadway, before such detour or roadway is open to traffic.
On page 75, section 6F-7d change the third sentence in the first paragraph to read:
However, if lights are needed to delineate the traveled way through and around obstructions in a temporary traffic control zone, the delineation shall be accomplished by steady-burning lamps.
This change will not make warning lights mandatory.
On page 78, section 6F-8 (2), add the following sentence to the last paragraph:
For stationary operations, the truck's parking brake should be set and, when possible, the front wheels turned away from the work site. Turning the front wheels should be based on specific conditions at the site such that the after-impact trajectory is into a safe area.
On page 78, section 6F-8.b, the third paragraph should be modified to read as follows:
On each side of the roadway only the first two yellow warning lights at the start of a continuous barrier should be Type
On page 87, section 6G-4. a, change the last sentence to read:
Flashing arrow displays
shouldshall be used only in the caution mode.
This agrees with section 6F-3. b first paragraph on page 61.
On page 107, Figure VI-11, Symbols used in typical application diagrams, make the following corrections:
concretebarrier with warning lights
Place an orange stripe on the Type III Barricade symbol.
- On page 111, Figure TA-2 surveyor symbols (as defined on page 107) should not be used to outline a blasting area.
- On page 115 in figure TA-4 add an additional arrow display under the Panel Display column that shows four or more lights in a horizontal direction for flashing Caution mode.
- One page 123, Figure TA-8 the white center line pavement marking at the top of the figure should be yellow.
- Figure TA-11 on page 129 and TA-13 on page 133 depicts a distance of 2S before and after the work space. This distance is to be replaced with the word "Buffer Space" per section 6C-2 c. (3) Buffer Space on page 9.
On page 132 revise number 5 to read:
A portable changeable message sign may be used in
placeaddition to the initial warning sign per section 6F-2 b application.
- On page 135, figure TA-14 The word "optional" should be placed below the warning light on top of the Road Work Ahead sign.
On page 140, make the following change to item #4 and #5:
4. A truck-mounted attenuator (TMA)
shallshould be used on the protection vehicle and shouldmay be consideredused on the work vehicle.
5. The work vehicle shall be equipped with beacons, and the protection vehicles shall be equipped with
a TMA andtwo high-intensity flashing lights mounted on the rear, adjacent to the sign. Protection and work vehicles should display flashing or rotating beacons both forward and to the rear.
On age 140, delete item 7 in its entirety because arrow displays are not to be used on two-lane roadways.
7. Arrow displays are optional and should be Type B, 60 inches by 30 inches.
- On page 145, Figure TA-19, the ONE-WAY arrow sign R6-1 under the DETOUR sign M4-10 should be black on white. The ONE-WAY arrow sign is a regulatory sign.
- On page 149, Figure TA-21, the channelizing devices form a right taper, the devices should form a left taper to agree with item number 2 on page 148.
- On page 151, Figure TA-22, the pavement marking are in error; the broken yellow lines going from the bottom to the top of the page should be broken white lines.
- On page 151, Figure TA-22, the channelizing island formed by the three devices (small orange squares) should be moved up just above the crosswalk closer to the intersection.
- On page 157, Figure TA-25, add the flag tree symbol above the 1/2L.
- On page 169, Figure TA-31, the word "optional" under Buffer Space should be deleted to agree with item number 3 on page 168.
The word "optional" should be placed below the arrow displays on several pages. This agrees with the first sentence in section 6F-3.b. Listed below are the pages with the respective figure numbers:
- On page 169, Figure TA-31
- On page 171, Figure TA-32
- On page 175, Figure TA-34
- On page 181, Figure TA-37
- On page 183, Figure TA-38
- On page 185, Figure TA-39
- On page 191, Figure TA-42
- On page 195, Figure TA-44;
- On page 173, Figure TA-33 the typical diagram on the right hand side needs to be clarified. The word "optional" is for the Truck Mounted attenuator and Arrow Display.
- On page 195, Figure TA-44 - The diagram on the right-side of the page, "ROAD WORK AHEAD" sign should be orange.
The stripes on Type III barricades on some typical application diagrams have been inadvertently shown in the wrong direction. The direction of the stripes should conform the section 6F-5f(l) Barricades, page 68, which states:
Where a barricade extends entirely across the roadway, the stripes should slope downward in the direction toward which traffic must turn. Where both right and left turns are provided, the stripes may slope downward in both directions from the center of the barricade oz barricades. Where no turn is intended, the stripes should slope downward toward the center of the barricade or barricades.
- The following are new signs with appropriate numbers to be added in MUTCD Section 6F.