Traffic Signal Plans

Chapter 4

Jerry Kotzenmacher

MN/DOT

2

Who Needs a Plan?

3

Who Needs a Plan?

4

Who Needs a Plan?

5

What is plan used for?

Contractors bid

Building the signal

Operating/maintaining the signal

Locates

Tort claims/Law suits

6

Typical Signal Plan

Required Sheets

Sheet Signal Design

Title Sheet

Estimated Quantities (if not shown on the title sheet)

Details Equipment Pad Layout Preformed NMC Loop Detector Detail Advance Warning Flasher Detail Signing and Pavement Markings Details Pole Mount Detail Other(s)

7

Typical Signal Plan

Required Sheets

Sheet Signal Design

Intersection Layout Sheet

Field Wiring Diagram

Interconnect Layouts

For Information Only Sheet(s)

Utilities

8

Title Sheet

Title Sheet

– The title sheet is

required for all traffic

signal plans. It

includes information

such as the title

block, project

location, governing

specifications, etc.

9

Title Sheet

– Plan Preparation Certification Note

– Signature Block

10

Title Sheet– Index Map

11

Title Sheet

– Abbreviations

12

Title Sheet

Standard Plates

– Filled arrows are the used plates.

13

Page 2 of the planEquipment Pad Details

14

Page 3 of the plan

Advance Warning Flasher Details

15

Page 4 of the plan

NMC Loop Detail

16

Page 8 of the plan Interconnect plan sheet

– Interconnect sheets use 100 scale

17

Page 9 of the plan

Utilities Plan Sheet

– This is a plan sheet view of the public utilities.

18

Page 10 of the plan

Saw Cut Loop Detail

19

Page 11 of the plan

Pole Base wire connector Detail

20

Page 12 of the plan

Pole Mount Detail – Angle & Straight

21

Last page of the planPedestrian Station Detail

22

Example only – not in your plan

Lighting Detail

– Shows the details of the lighting units if

included in the project.

Note: Shown graphic not from

sample signal plan

23

Example only – not in your plan

Tabulations

– Earthwork summary tabulations may be included if this signal project is part of a construction project.

Note: Shown graphic not from

sample signal plan

24

25

Signal Layout-PAGE 5

Road Lines

conduit

Ped diagram

and

Phasing

Signal Face

Chart

Scale

Pole numbering starts at the

cabinet going clockwise.

Indications read right

to left.

Conduit Wires

2-12/c #14

1-3/c #14

5-2/c #14

1-3/c #20

1-6/PR #19

1-1/c #6 INS. GR

Pole Notes

Loop Detector

Detector Chart

Construction Notes

26

Controller Operations– Phasing

– Dual-ring and Concurrent group Controllers

DUAL RING STRUCTURE

5 6

3 41 2

7 8

RING 1

RING 2

BARRIER 1

(LEFT SIDE)

BARRIER 2

(RIGHT SIDE)

27

Signal Layout – Page 6

Pavement Markings Detail

Advance Detectors

Match line

Match line

28

Signal Layout

Equipment Pad

Equipment Pad

Controller

CabinetService

Cabinet

29

Signal Layout

Pole Symbols & Names

Signal Pole Base Foundation

Transformer

Base

Pole

30

Signal Layout

Pole Symbols

Mast Arm Pole

Signal Indication

31

Signal Layout

Pole Symbols

Luminare

Emergency Vehicle

Pre-emption

32

Signal LayoutPole #3 Notes

Signal Pole Base

33

Signal LayoutPole Note #3 –

3rd line

Pole Type

PA100

Pole length

(50’) with

A type bolt

pattern

Davit (luminare

arm) mounting

Height (40’)

9’ Davit (luminare

arm) mounting

at 350o

34

Signal Layout

Pole #3 Notes

Signal Pole Base #3

Mast Arm at 0 degree

35

Signal Layout

Indications – Left Turns Protected Vehicle

Signal Face

Vehicle Signal

Face

36

Signal LayoutSignal Face Chart – Left Turns

Permissive

Prot/Perm

Protected

37

Signal LayoutSignal Face Chart – Left Turns

Flashing Yellow Arrow

38

Signal Layout Phasing & Pedestrian

Chart – Numbering –APS Address

39

Signal Layout - Peds

Pedestrian Symbols

Pedestrian Countdown

Signal Face

Pedestrian Push

Button (APS)Pedestrian

Pedestal

40

Signal Layout - Peds

Pedestrian Push Button Station & APS

Pedestrian Push

Button Station

41

Signal Layout

Hand Hole

Handhole 1

Handhole 15

Handhole 16

42

Signal Layout

DetectionDetector

Detector

43

Signal Layout

Detector Chart

44

Signal Layout

Advanced Warning Flasher

Advance Warning

Flasher

Note: Above graphic not from

sample signal plan

45

12

Conductor

Wire

Wiring DiagramField Wiring - Page 7 of 12

Hand Hole

Controller

Cabinet

Loop

Detectors

Wire

#11

Wire

#11

Pole Number

Notes

Service

Cabinet

Ground

Rod

Insulated

ground

46

Wiring DiagramLayout/Wire Diagram Cross Reference

47

Wiring Diagram Field Wiring Controller

Cabinet

Signal

Service

48

Wiring Diagram

Field Wiring

49

Wiring Diagram

Field Wiring

50

Field Wiring

Wiring Diagram

Loop Detector Graphic

New Existing

Handhole Graphic

New Existing

D2-1 D6-1

HH 19 HH 20

Splice

Splice

51

Mn/DOT - Signal Courses

Training Schedule

– Traffic Signal Design…April 27 - 29th,

2010

Roadway Lighting ..May 12 - 13th 2010

– www.dot.state.mn.us/trafficeng.html

52

It worked

when I left!

Questions?