Attachment 1 325a325b325c.pdf
PDF 540 KB Posted
- Attached to
- Bid No. 256025 Asphaltic Concrete Trench Patching, Overlay, Milling / Inlay, Milling and Speed Bumps
- Solicitation number
- S-KS0043-00013386
- Issued by
- Marion County, Oregon
About this file
The document is a set of three standard city engineering plans (No. 325A, 325B, and 325C) from the City of Salem Department of Public Works, detailing specifications for speed bump installations across different street types. The plans provide comprehensive design guidelines for three variations of speed bumps: a standard version for local streets (325A), a three-cushion version for collector streets (325B), and a four-cushion version for arterial streets, all intended for use on streets with posted speeds of 25 MPH or less. Each plan includes detailed technical specifications such as parabolic crown dimensions, asphalt concrete layering, taper requirements, and placement guidelines, with consistent requirements including a maximum street grade of less than 8%, minimum of two speed bumps per street spaced 300-500 feet apart, and mandates for white thermoplastic pavement markings.
The speed bump designs are part of the City of Salem's Neighborhood Traffic Management Program, with each variant tailored to different street classifications. Common specifications across all designs include a 12-inch taper, tack coat application, level 2 (3/8" dense) asphalt concrete in two lifts, and specific requirements for signage and lane markings. The plans were drawn by RRT, checked by AAE, and approved by the City Engineer, with the most recent revisions made on 03/07/2025. The documents emphasize safety and traffic calming measures, providing engineers and construction teams with precise technical guidance for speed bump implementation across varying street types.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| 256025 Notice Intent to Award.pdf | ||
| General Conditions~17.pdf | ||
| 256025 Supplemental Information Letter No. 1~1.pdf | ||
| Zoom Bid Opening Instructions 4.22.25~1.docx | DOCX document | |
| 256025 Bid Tabulation.pdf | ||
| Attachment 2 Erosian Control.pdf | ||
| 256025 Technical Specifications.docx | DOCX document | |
| SP Notice for Multi-Mission Twin Otter Aircraft.docx | DOCX document | |
| 256025 Bid Manual.pdf |
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Text version
CURB
1.
5"
2.
0"
2.
4"
2.
8"
2.
9"
3.
0"
(TOLERANCE ± 0.25)
PARABOLIC CROWN
CENTERLINE
STREET
(W17-1)
TRAVEL LANE (TYP.)
CENTER OF
(W17-1)
SP
EE
D
BU
M P
CL
0.
8"
SPEED
BU
M P
TACK COAT
B
B
A A 7' 7'
30'
TYPICAL
100' DESIRABLE
AT BEGINNING OF SERIES
OF SPEED BUMPS
100' DESIRABLE
AT BEGINNING OF SERIES
OF SPEED BUMPS
7' 7'
1' 1' 1' 1' 1' 1' 1'
FACE OF CURB OR
EDGE OF PAVEMENT
2' MAX. 12"
TAPER LEVEL 2 (3/8" DENSE)
ASPHALT CONCRETE, 2 LIFTS
TACK COAT
SEE STANDARD PLAN
322C (TYP.)
NO.325A
SPEED BUMP
SECTION B-B
DRAWN BY
CHECKED BY
STANDARD PLAN
CITY OF SALEM
DEPARTMENT OF PUBLIC WORKS
C H
AN
G
ES
DATECITY ENGINEER
DESCRIPTION
1. USE ONLY ON LOCAL STREETS WITH A POSTED
SPEED OF 25 MPH OR LESS.
2. WHITE PAVEMENT MARKINGS TO BE PREFORMED
THERMOPLASTIC.
3. MAXIMUM STREET GRADE MUST BE LESS THAN 8%.
4. USE ONLY ON LOCAL STREETS THAT MEET
NEIGHBORHOOD TRAFFIC MANAGEMENT
PROGRAM REQUIREMENTS.
5. MINIMUM OF 2 SPEED BUMPS PER STREET, SPACE
300-500 FEET APART.
6. PAVEMENT MARKINGS AND SIGNS SHALL BE
INSTALLED BEFORE OPENING ANY LANE TO
TRAFFIC THAT IS OCCUPIED BY A NEW SPEED
BUMP.
NOTES:
APPROVED
RRT
AAE
SECTION A-A
SPEED BUMP
(TYPICAL)
03/2025
CHANGED TO NUMBER 325A TO EXPAND FOR ADDING 325B AND 325C
03/2025
SET TYPICAL SPACING IN NOTE 5
ADDED NOTE 6
03/07/2025
Jump to TOC
1.
5"
2.
0"
2.
4"
2.
8"
2.
9"
3.
0"
(TOLERANCE ± 0.25)
PARABOLIC CROWN
CENTERLINE
STREET
(W17-1)
(W17-1)
SP
EE
D
BU
M P
CL
0.
8"
SPEED
BU
M P
TACK COAT
B
B
A A
40' OR LESS
TYPICAL
100' DESIRABLE
AT BEGINNING OF SERIES
OF SPEED BUMPS
100' DESIRABLE
AT BEGINNING OF SERIES
OF SPEED BUMPS
7' 7'
1' 1' 1' 1' 1' 1' 1'
FACE OF CURB OR
EDGE OF PAVEMENT
2' 12"
TAPER
LEVEL 2 (3/8" DENSE)
ASPHALT CONCRETE, 2 LIFTS
TACK COAT
7'
VA
R
IE
S
80"
VA
R
IE
S
9" 20" 9"
WHEEL PATH
7'
5'
20"
20"
2'
2'
TRAVEL LANE (TYP.)
CENTER OF
SEE STANDARD PLAN
322C (TYP.)
NO.325B
SPEED BUMP (3 CUSHION)
SECTION B-B
DRAWN BY
CHECKED BY
STANDARD PLAN
CITY OF SALEM
DEPARTMENT OF PUBLIC WORKS
C H
AN
G
ES
DATECITY ENGINEER
DESCRIPTION
1. USE ONLY ON COLLECTOR STREETS WITH A
POSTED SPEED OF 25 MPH OR LESS.
2. WHITE PAVEMENT MARKINGS TO BE PREFORMED
THERMOPLASTIC.
3. MAXIMUM STREET GRADE MUST BE LESS THAN 8%.
4. USE ONLY ON COLLECTOR STREETS THAT MEET
NEIGHBORHOOD TRAFFIC MANAGEMENT
PROGRAM REQUIREMENTS.
5. MINIMUM OF 2 SPEED BUMPS PER STREET, SPACE
300-500 FEET APART.
6. PAVEMENT MARKINGS AND SIGNS SHALL BE
INSTALLED BEFORE OPENING ANY LANE TO
TRAFFIC THAT IS OCCUPIED BY A NEW SPEED
BUMP.
NOTES:
APPROVED
RRT
AAE
SECTION A-A
SPEED BUMP
(3 CUSHION)
03/2025
DRAWING CREATED
03/2025
2'
1.
5"
2.
0"
2.
4"
2.
8"
2.
9"
3.
0"
(TOLERANCE ± 0.25)
PARABOLIC CROWN
CENTERLINE
STREET
(W17-1)
(W17-1)
SP
EE
D
BU
M P
CL
0.
8"
SPEED
BU
M P
TACK COAT
B
B
A A
40' OR LESS
TYPICAL
100' DESIRABLE
AT BEGINNING OF SERIES
OF SPEED BUMPS
100' DESIRABLE
AT BEGINNING OF SERIES
OF SPEED BUMPS
7' 7'
1' 1' 1' 1' 1' 1' 1'
FACE OF CURB OR
EDGE OF PAVEMENT
2' 12"
TAPER
LEVEL 2 (3/8" DENSE)
ASPHALT CONCRETE, 2 LIFTS
TACK COAT
9" 20" 9"
WHEEL PATH
7'
VARIES
80"
80"
VARIES
TRAVEL LANE (TYP.)
CENTER OF
SEE STANDARD PLAN
322C (TYP.)
2'
20"
5'
20"
5'
20"
NO.325C
SECTION B-B
DRAWN BY
CHECKED BY
STANDARD PLAN
CITY OF SALEM
DEPARTMENT OF PUBLIC WORKS
C H
AN
G
ES
DATECITY ENGINEER
DESCRIPTION
1. USE ONLY ON ARTERIAL STREETS WITH A POSTED
SPEED OF 25 MPH OR LESS.
2. WHITE PAVEMENT MARKINGS TO BE PREFORMED
THERMOPLASTIC.
3. MAXIMUM STREET GRADE MUST BE LESS THAN 8%.
4. USE ONLY ON ARTERIAL STREETS THAT MEET
NEIGHBORHOOD TRAFFIC MANAGEMENT
PROGRAM REQUIREMENTS.
5. MINIMUM OF 2 SPEED BUMPS PER STREET, SPACE
300-500 FEET APART.
6. PAVEMENT MARKINGS AND SIGNS SHALL BE
INSTALLED BEFORE OPENING ANY LANE TO
TRAFFIC THAT IS OCCUPIED BY A NEW SPEED
BUMP.
NOTES:
APPROVED
RRT
AAE
SECTION A-A
SPEED BUMP
(4 CUSHION)
03/2025
DRAWING CREATED
03/2025
SPEED BUMP (4 CUSHION)
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