Mobile Operations
(PATA 300 Series)

PATA 301 (Old PATA 6)
Work Space On Or Beyond The Shoulder (No Roadway Encroachment)

  1. Traffic control devices are not required if the work space is outside the highway right-of-way, behind barrier, more than 2' behind curb, or 15' or more from the edge of any roadway.
  2. For operations 60 minutes or less, the Length of Work (G20-1) sign may be eliminated if both the shadow vehicle and work vehicle have an activated flashing or revolving yellow light.
  3. For a work area greater than 3 miles, a second Length Of Work (G20-1) sign may be installed at the end of the first 3 mile segment.
  4. When a shadow vehicle is not used, distance A is measured from the Length Of Work (G20-1) sign location to beginning of work space.

Signs

Sign Spacing Chart

Condition Distance
A B C F
  Feet Feet Feet Feet
Urban 35 MPH or Less 100 100 100 100
Urban Greater than 35MPH 350 350 350 350
Rural 500 500 500 500

When multiple distance plaques are used on advance warning signs, they shall all be of the same series type.

Example: either all "AHEAD" or XXX FEET.

Distance and Spacing Quick Reference Chart

Speed W L 1/2 L 1/3 L Min. Channelizing Devices
Per Taper Type (Length)
D E H
MPH Feet Feet Feet Feet L 1/2 L 1/3 L 50' Feet Feet Feet
25 10 105 55 35 6 6 6 6 50 155 150
11 115 60 40
12 125 65 45
30 10 150 75 50 6 6 6 6 60 200 150
11 165 85 55 7
12 180 90 60 7
35 10 205 105 70 7 6 6 6 70 250 150
11 225 115 75 8
12 245 125 85 8
40 10 270 135 90 8 6 6 6 80 305 150
11 295 150 100 9
12 320 160 110 9
45 10 450 225 150 11 6 6 6 90 360 150
11 495 250 165 12 7
12 540 270 180 13 7
50 10 500 250 170 11 6 6 6 100 425 250
11 550 275 185 12 7
12 600 300 200 13 7
55 10 550 275 185 11 6 6 6 110 495 250
11 605 305 205 12 7
12 660 330 220 13 7

Note: Channelizing devices used in taper shall be equally spaced at 1/2 D Max.

PATA 302 (Old PATA 11a)
Mobile Flaggers

  1. nterim Be Prepared To Stop (W3-4) signs are required for any project over 1 mile in length and shall be spaced at intervals not exceeding one mile. The signs shall be installed on the roadway approaching the work being performed.
  2. The signing for side roads is optional. If signed, refer to PATA 006 for guidance.
  3. The minimum distance of A is only required between the first Be Prepared To Stop (W3-4) sign and Flaggers A and B. The minimum distance of A is not required between the flagger and interim Be Prepared To Stop (W3-4) signs.
  4. Flagger A and Flagger B are permitted to relocate by walking if proper sight distance (i.e. Distance E) is maintained. If the flaggers cannot safely relocate, refer to PATA 302A for the appropriate flagger relocation option.
  5. A flagger shall not relocate to a new location while holding stopped traffic.
  6. If the operation temporarily does not meet the distance and time requirements of a mobile operation (i.e. minimum of 100' every 15 minutes), one of the following options must be utilized:
    1. PATA 302B.
    2. PATA 302C.
    3. Set up an appropriate short-term operation (PATA 100 Series).
    4. Remove all workers and equipment from the roadway until the mobile operation can resume.
  7. If a pilot vehicle is utilized for the entire length and duration of the mobile operation, the distance and time requirements of a mobile operation (i.e. minimum of 100' every 15 minutes) are waived. Refer to PATA 302C.

Signs

Sign Spacing Chart

Condition Distance
A B C F
  Feet Feet Feet Feet
Urban 35 MPH or Less 100 100 100 100
Urban Greater than 35MPH 350 350 350 350
Rural 500 500 500 500

When multiple distance plaques are used on advance warning signs, they shall all be of the same series type.

Example: either all "AHEAD" or XXX FEET.

Distance and Spacing Quick Reference Chart

Speed W L 1/2 L 1/3 L Min. Channelizing Devices
Per Taper Type (Length)
D E H
MPH Feet Feet Feet Feet L 1/2 L 1/3 L 50' Feet Feet Feet
25 10 105 55 35 6 6 6 6 50 155 150
11 115 60 40
12 125 65 45
30 10 150 75 50 6 6 6 6 60 200 150
11 165 85 55 7
12 180 90 60 7
35 10 205 105 70 7 6 6 6 70 250 150
11 225 115 75 8
12 245 125 85 8
40 10 270 135 90 8 6 6 6 80 305 150
11 295 150 100 9
12 320 160 110 9
45 10 450 225 150 11 6 6 6 90 360 150
11 495 250 165 12 7
12 540 270 180 13 7
50 10 500 250 170 11 6 6 6 100 425 250
11 550 275 185 12 7
12 600 300 200 13 7
55 10 550 275 185 11 6 6 6 110 495 250
11 605 305 205 12 7
12 660 330 220 13 7

Note: Channelizing devices used in taper shall be equally spaced at 1/2 D Max.

PATA 302A (Old PATA 11a)
Flagger Relocation

General - All Relocation Options
  1. This PATA shall only be used in conjunction with PATA 302 to relocate flaggers.
  2. Downstream is in reference to the direction the operation is proceeding.
  3. The shadow vehicle driver may be a temporary flagger.
  4. Only the downstream flagger (Flagger A) may allow traffic to free-flow during relocation since traffic maintains its original travel lane.
  5. Flaggers shall not be relocated to a new location when holding stopped traffic.
  6. Vehicles that are relocating flaggers shall only proceed in the direction of traffic flow through the work zone.
  7. Flaggers shall exhibit safe practices when relocating to new flagging locations.
Option A - Walking

Flagger A

  1. To relocate F lagger A using a temporary flagger:
    1. Station a temporary flagger (Temporary F lagger A) downstream of Flagger A.
    2. When the Temporary Flagger A is in position, Flagger A walks to the new flagging location while holding stop/slow paddle at side (neither side of the stop/slow paddle is displayed to traffic).
    3. When Flagger A arrives at the new flagging location, Flagger A will resume flagging duties.
  2. To relocate Flagger A without using a temporary flagger:
    1. While Flagger B has traffic stopped, Flagger A releases traffic and walks downstream to the new flagging location while holding stop/slow paddle at side (neither side of the stop/slow paddle is displayed to traffic).
    2. While Flagger A is walking to the new flagging location, the traffic that Flagger A was controlling is free-flowing.
    3. When Flagger A arrives at the new flagging location, Flagger A will resume flagging duties.

Flagger B

  1. To relocate Flagger B using a temporary flagger:
    1. Station a temporary flagger (Temporary Flagger B) downstream of Flagger B.
    2. When the Temporary Flagger B is in position, Flagger B walks to the new flagging location while holding stop/slow paddle at side (neither side of the stop/slow paddle is displayed to traffic).
    3. When Flagger B arrives at the new flagging location, Flagger B will resume flagging duties.
  2. To relocate Flagger B without using a temporary flagger:
    1. F lagger B is not permitted to relocate without a temporary flagger.
Option B - Work Vehicle

Flagger A

  1. To relocate Flagger A using a temporary flagger:
    1. Station a temporary flagger (Temporary Flagger A) downstream of Flagger A.
    2. When the Temporary Flagger A is in position and controlling traffic, Flagger A enters work vehicle for transportation to the new flagging location.
    3. When Flagger A arrives at the new location, Flagger A will resume flagging duties.
  2. To relocate Flagger A without using a temporary flagger:
    1. While Flagger B has traffic stopped, Flagger A releases traffic and enters work vehicle after queued traffic has cleared out.
    2. While Flagger A is being transported to the new flagger location, the traffic that Flagger A was controlling is free-flowing.
    3. When Flagger A arrives at the new flagging location, Flagger A will resume flagging duties.

Flagger B

  1. To relocate Flagger B using a temporary flagger:
    1. Station a temporary flagger (Temporary Flagger B) downstream of Flagger B.
    2. When the Temporary Flagger B is in position, Flagger B enters work vehicle for transportation to the new flagging location.
    3. When Flagger B arrives at the new location, Flagger B will resume flagging duties.
  2. To relocate Flagger B without using a temporary flagger:
    1. Flagger B is not permitted to relocate without a temporary flagger.
Option C - Pilot Vehicle

Flagger A

  1. To relocate Flagger A using a temporary flagger:
    1. Station a temporary flagger (Temporary Flagger A) downstream of Flagger A.
    2. When the Temporary Flagger A is in position and controlling traffic, Flagger A enters pilot vehicle for transportation to the new flagging location.
    3. When Flagger A arrives at the new location, Flagger A will resume flagging duties.
  2. To relocate Flagger A without using a temporary flagger:
    1. After the pilot vehicle has guided the traffic controlled by Flagger B through the work zone, the pilot vehicle pulls off the road in the vicinity of Flagger A.
    2. While Flagger B has traffic stopped, Flagger A releases traffic and enters pilot vehicle after queued traffic has cleared out.
    3. While Flagger A is being transported to the new flagger location, the traffic that Flagger A was controlling is free-flowing.
    4. When Flagger A arrives at the new flagging location, Flagger A will resume flagging duties.

Flagger B

  1. To relocate Flagger B using a temporary flagger:
    1. Station a temporary flagger (Temporary Flagger B) downstream of Flagger B.
    2. When the Temporary Flagger B is in position, Flagger B enters pilot vehicle for transportation to the new flagging location.
    3. When Flagger B arrives at the new location, Flagger B will resume flagging duties.
  2. To relocate Flagger B without using a temporary flagger:
    1. While Flagger A and Flagger B has traffic stopped, the pilot vehicle pulls in front of queued traffic that Flagger B is controlling.
    2. Flagger B enters pilot vehicle for transportation to the new flagging location.
    3. While Flagger B is being transported to the new flagging location, the traffic that Flagger B was controlling is being guided by the pilot vehicle.
    4. When Flagger B arrives at the new location, Flagger B will resume flagging duties after pilot vehicle and all queued traffic have cleared out.

PATA 302B
Temporary Operation Stoppage During A Mobile Operation

  1. This PATA shall only be used in conjunction with PATA 302 when the operation temporarily does not meet the distance and time requirements of a mobile operation (i.e. minimum of 100' every 15 minutes).
  2. When a shadow vehicle is not used, distance E is measured from the end of the taper to the beginning of the work space.
  3. The buffer space is not required if a shadow vehicle is used.
  4. The minimum distance of A is only required between the first Be Prepared To Stop (W3-4) sign and Flaggers A and B. The minimum distance of A is not required between the flagger and interim Be Prepared To Stop (W3-4) signs.
  5. The signing for side roads is optional. If signed, refer to PATA 006 for guidance.

Signs

Sign Spacing Chart

Condition Distance
A B C F
  Feet Feet Feet Feet
Urban 35 MPH or Less 100 100 100 100
Urban Greater than 35MPH 350 350 350 350
Rural 500 500 500 500

When multiple distance plaques are used on advance warning signs, they shall all be of the same series type.

Example: either all "AHEAD" or XXX FEET.

Distance and Spacing Quick Reference Chart

Speed W L 1/2 L 1/3 L Min. Channelizing Devices
Per Taper Type (Length)
D E H
MPH Feet Feet Feet Feet L 1/2 L 1/3 L 50' Feet Feet Feet
25 10 105 55 35 6 6 6 6 50 155 150
11 115 60 40
12 125 65 45
30 10 150 75 50 6 6 6 6 60 200 150
11 165 85 55 7
12 180 90 60 7
35 10 205 105 70 7 6 6 6 70 250 150
11 225 115 75 8
12 245 125 85 8
40 10 270 135 90 8 6 6 6 80 305 150
11 295 150 100 9
12 320 160 110 9
45 10 450 225 150 11 6 6 6 90 360 150
11 495 250 165 12 7
12 540 270 180 13 7
50 10 500 250 170 11 6 6 6 100 425 250
11 550 275 185 12 7
12 600 300 200 13 7
55 10 550 275 185 11 6 6 6 110 495 250
11 605 305 205 12 7
12 660 330 220 13 7

Note: Channelizing devices used in taper shall be equally spaced at 1/2 D Max.

PATA 302B

PATA 303 (Old PATA 12)
Moving Lane Closure

  1. The shadow vehicle shall be positioned so that it is visible from behind the work vehicle for a minimum distance of A. The shadow vehicle should slow down in advance of vertical or horizontal curves that restrict sight distance.
  2. Where passing is not permitted for extended lengths, the shadow and work vehicles should pull over periodically, when it is reasonable and safe, in order to allow traffic to resume normal speeds.
  3. The shadow vehicle should be equipped with two high-intensity flashing lights mounted on the rear and located adjacent to the sign.
  4. The shadow vehicle may be equipped with a flashing arrow panel in caution mode.
  5. A "W Series" (W14-12, W21-14, W21-11, etc) sign or message board on the rear of the shadow vehicle is required.
  6. Refer to PATA 012 for arrow panel sizing.

Signs

Sign Spacing Chart

Condition Distance
A B C F
  Feet Feet Feet Feet
Urban 35 MPH or Less 100 100 100 100
Urban Greater than 35MPH 350 350 350 350
Rural 500 500 500 500

When multiple distance plaques are used on advance warning signs, they shall all be of the same series type.

Example: either all "AHEAD" or XXX FEET.

PATA 304 (Old PATA 16)
Work Space In The Left Or Right Of A Two-Lane Approach

  1. Shadow vehicles are required unless otherwise stated on the PATA drawings.
  2. Flashing arrow panels are required for all shadow vehicles. Placement of the Lane Closed (W20-5L or W20-5R) sign on shadow vehicle 2 and shadow vehicle 3 is optional. If used, it should be placed so that it will not diminish the target value of the flashing arrow panel.
  3. If sufficient shoulder width is not available for the shadow vehicles positioned on the shoulder, shadow vehicles shall be positioned as close as possible to the shoulder edge.
  4. Shadow vehicles are permitted to straddle edge lines.
  5. Whenever adequate stopping sight distance exists to the rear, the shadow vehicle 1 should maintain the minimum distance from the work vehicle and proceed at the same speed. The shadow vehicle should slow down in advance of vertical or horizontal curves.
  6. This operation should be done during non-peak hours of traffic, to be determined by the District Traffic Unit.
  7. Refer to PATA 012 for arrow panel sizing.

Signs

Sign Spacing Chart

Condition Distance
A B C F
  Feet Feet Feet Feet
Urban 35 MPH or Less 100 100 100 100
Urban Greater than 35MPH 350 350 350 350
Rural 500 500 500 500

When multiple distance plaques are used on advance warning signs, they shall all be of the same series type.

Example: either all "AHEAD" or XXX FEET.

Continuously Moving Right Lane Operation - Traffic Merges To The Left

Continuously And Intermittently Moving Left Lane Operation - Traffic Merges To The Right

Intermittently Moving Right Lane Operation - Traffic Merges To The Left

PATA 305 (Old PATA 18)
Work Space In The Left Or Right Lane

  1. Shadow vehicles are required unless otherwise stated on the PATA drawings.
  2. Flashing arrow panels are required for all shadow vehicles. Placement of the Lane Closed (W20-5L or W20-5R) sign on shadow vehicle 2 and shadow vehicle 3 is optional. If used, it should be placed so that it will not diminish the target value of the flashing arrow panel.
  3. If sufficient shoulder width is not available for the shadow vehicles positioned on the shoulder, shadow vehicles shall be positioned as close as possible to the shoulder edge.
  4. Shadow vehicle are permitted to straddle edge lines.
  5. Whenever adequate stopping sight distance exists to the rear, shadow vehicle 1 should maintain the minimum distance from the work vehicle and proceed at the same speed. The shadow vehicle should slow down in advance of vertical or horizontal curves.
  6. This operation should be done during non-peak hours of traffic, to be determined by the District Traffic Unit.
  7. Refer to PATA 012 for arrow panel sizing.

Signs

Sign Spacing Chart

Condition Distance
A B C F
  Feet Feet Feet Feet
Urban 35 MPH or Less 100 100 100 100
Urban Greater than 35MPH 350 350 350 350
Rural 500 500 500 500

When multiple distance plaques are used on advance warning signs, they shall all be of the same series type.

Example: either all "AHEAD" or XXX FEET.

Continuously Moving Right Lane Operation - Traffic Merges To The Left

Intermittently Moving Left Lane Operation - Traffic Merges To The Right

Intermittently Moving Right Lane Operation - Traffic Merges To The Left

Intermittently Moving Left Lane Operation - Traffic Merges To The Right

PATA 306 (Old PATA 23)
Work Space In Any Lane Of A Three Or More-Lane Approach

  1. Shadow vehicles are required unless otherwise stated on the PATA drawings.
  2. Flashing arrow panels are required for all shadow vehicles. Placement of the Lane Closed (W20-5L, W20-5R, or W9-3) sign on shadow vehicle 2 and shadow vehicle 3 is optional. If used, it should be placed so that it will not diminish the target value of the flashing arrow panel.
  3. If sufficient shoulder width is not available for the shadow vehicles positioned on the shoulder, shadow vehicles shall be positioned as close as possible to the shoulder edge.
  4. Shadow vehicle are permitted to straddle edge lines.
  5. If shadow vehicle 3 is not used during continuously moving center lane operations, shadow vehicle 2 will display a flashing arrow panel pointing to the left and right.
  6. Whenever adequate stopping sight distance exists to the rear, shadow vehicle 1 should maintain the minimum distance from the work vehicle and proceed at the same speed. The shadow vehicle should slow down in advance of vertical or horizontal curves.
  7. This operation should be done during non-peak hours of traffic, to be determined by the District Traffic Unit.
  8. Refer to PATA 012 for arrow panel sizing.

Signs

Sign Spacing Chart

Condition Distance
A B C F
  Feet Feet Feet Feet
Urban 35 MPH or Less 100 100 100 100
Urban Greater than 35MPH 350 350 350 350
Rural 500 500 500 500

When multiple distance plaques are used on advance warning signs, they shall all be of the same series type.

Example: either all "AHEAD" or XXX FEET.

Continuously Moving Right Lane Operation - Traffic Merges To The Left

Continuously Moving Left Lane Operation - Traffic Merges To The Right

Continuously Moving Center Lane Operation - Traffic Merges To The Left Or Right

Intermittently Moving Right Lane Operation - Traffic Merges to The Left

Intermittently Moving Left Lane Operation - Traffic Merges to The Right

Intermittently Moving Center Lane Operation - Traffic Merges to The Left

Intermittently Moving Center Lane Operation - Traffic Merges to The Right