Sections 105, 202, 401, 405, 406, and 412 of the Standard Specifications and Supplemental Specifications are hereby revised for this project as follows:

Add subsection 105.031, immediately following subsection 105.03, which shall consist of the following:

105.031 Roadway Smoothness. Roadway smoothness shall be tested as described below. Roadway smoothness testing will not be measured and paid for separately, but shall be included in the work.

(a) Transverse Pavement Surface Smoothness. The finished transverse surface elevation of the pavement will be measured using a 3 m (10 foot) straightedge.

The Contractor shall furnish an approved 3 m (10 foot) straightedge and depth gauge and provide an operator to aid the Engineer in testing the finished pavement surface. Areas to be measured shall be as directed by the Engineer. Areas showing high spots of more than 5 mm in 3 m (3/16 inch in ten feet) shall be marked and diamond ground until the high spot does not exceed 5 mm in 3 m (3/16 inch in ten feet). Additional diamond grinding shall be performed as necessary to extend the area ground in each lateral direction so that the lateral limits of grinding are at a constant offset from and parallel to the nearest lane line or pavement edge, and in each longitudinal direction so that the grinding begins and ends at lines normal to the pavement centerline within the ground area. All ground areas shall be neat rectangular areas of uniform surface.

(b) Longitudinal Pavement Surface Smoothness. Pavement surfaces shall be tested and evaluated for longitudinal smoothness as described herein.

1. Testing Procedure (General). The longitudinal surface smoothness of the pavement shall be tested using the profilograph method described below.

Each profilograph shall be certified in accordance with CP 73 and have a certification sticker which includes the date of certification, the type of filter, and the filter setting used when the profilograph was certified.

The Project Engineer may require a profilograph to be recertified at any time. If the profilograph being recertified meets the criteria for certification on the first try the costs of recertification will be paid as extra work. If not, the cost of the recertification shall be borne by the Contractor.

The Contractor shall provide, operate, and maintain on the project, an approved profilograph that meets the following requirements:

The profilograph shall be equipped with:

(1) A microcomputer capable of automatically reducing the recorded profilograph data and downloading it to a disk. The data on the disk shall be formatted to permit evaluation of the data by the Engineer. If software is required for this evaluation, the Contractor shall provide copies of the software for the Engineer’s use.

(2) A printer compatible with the microcomputer that prints a profilogram with the required data.

The Contractor shall arrange and pay for training for Contractor and CDOT project personnel in the calibration, operation and maintenance of the profilograph. The training shall be conducted by a representative of the manufacturer of the profilograph that will be used on the project. The training shall be conducted on the project at least three working days before any profiles are taken. The representative of the profilograph manufacturer that conducts the training shall issue each individual attendee a letter stating that they have been trained in the calibration, operation and maintenance of the specific profilograph being used on the project. If both the inspector and the operator have documentation that they have received such training within the last two years, the Engineer may waive the training.

In lieu of the above training the Contractor may furnish to the Engineer a CDOT approved video tape which provides instruction on the calibration, operation and maintenance of the specific profilograph being used on the project and certify in writing that the operator has been trained in the calibration, operation and maintenance of the specific profilograph being used.

If Contractor and CDOT personnel possess a current Laboratory Certification for Asphalt Technicians (LABCAT) certification for operation of profilographs the above training will not be required.

The profilograph shall be operated at a speed of not more than 5 km/h (3 miles per hour). To insure that these speeds are maintained, the profilograph may be propelled by a motorized vehicle which is capable of maintaining the correct speed. The motorized vehicle shall propel the profilograph in accordance with the Manufacturer's recommendations without interfering with traffic or the operation of the profilograph.

The profilograph shall be calibrated after transportation and before each day’s use in accordance with the manufacturer’s instructions.

As directed by the Engineer, additional profiles shall be taken to retest paved surfaces that have received corrective work, to check previously submitted data or to identify the limits of irregularities.

The profile shall include transverse joints when pavement is placed on both sides of the joint. When pavement is placed on only one side of the joint the profile shall begin 7.6 m (25 feet) from the joint. One sided joints shall be profiled to determine conformity to the bump specification.

The Contractor shall notify the Engineer prior to beginning each profilograph operation. Horizontal and vertical calibrations shall be made by the Contractor and witnessed by the Engineer prior to performing profile testing. Profile testing will be randomly witnessed by the Engineer.

Upon completion of a profile, the profilogram and disk shall be immediately submitted to the Engineer.

Each profilogram shall include the following information:

A. Project subaccount number.

B. Project number.

C. Project location.

D. Date.

E. Lane and wheel path profiled.

F. Operator’s signature.

G. Profile in mm/km (inches per mile).

Each profilogram trace shall be marked by the computer or the Contractor to indicate the following:

A. Beginning and ending stations.

B. Intermittent reference stations at least every 150 m (500 linear feet).

C Beginning and ending reference points.

D. Horizontal equations stations.

E. Construction joints.

F. Location of bridge abutments.

G. Net total meters (linear feet) of each lane.

H. Net square meters (square yards) of each lane.

I. Bumps: when the perpendicular distance from a 7.6 m (25 feet) baseline to the profile exceeds 10 mm (0.4 inch).

The Profile in mm/km (inches per mile)shall be determined by the computer or the Contractor for each lane. The Profile shall be called a Lane Profile Index (LPI). The LPI shall consist of two profiles taken 0.9 m (3 feet) from and parallel to the edge of each lane. The two profiles for each lane shall be averaged to determine the LPI.

The entire length of each through lane, climbing lane and passing lane including bridge approaches and bridge decks from the beginning to the end of the project shall be profiled. Shoulders, ramps, tapers, turn slots, acceleration lanes, deceleration lanes, and medians shall not be profiled and will not be subject to incentive/ disincentive adjustments. The profile of the entire length of a lane may be taken at one time or the lane may be profiled in increments and combined to obtain the LPI. Profiles may be taken with or against stationing.

All other longitudinal pavement surfaces will be measured using a 3 m (10 foot) straightedge. The Contractor shall furnish an approved 3 m (10 foot) straightedge and depth gauge and provide an operator to aid the Engineer in testing the finished pavement surface. Areas to be measured shall be as directed by the Engineer. Areas showing high spots of more 5 mm in 3 m (3/16 inch in ten feet) shall be marked and diamond ground until the high spot does not 5 mm in 3 m (3/16 inch in ten feet). Additional diamond grinding shall be performed as necessary to extend the area ground in each lateral direction so that the lateral limits of grinding are at a constant offset from and parallel to the nearest lane line or pavement edge, and in each longitudinal direction so that the grinding begins and ends at lines normal to the pavement centerline within the ground area. All ground areas shall be neat rectangular areas of uniform surface.

The profile of the area 7.6 m (25 feet) each side of every bridge expansion device (joint) shall be deleted from the profile before the LPI is determined. Incentive/disincentive payments will not be made for this area. If the Engineer determines that corrective work is required in this area, payment will be made in accordance with subsection 109.04.

2. Smoothness testing procedures. The Contractor shall profile the surface of the pavement placed on the second day of paving as soon as possible after completion of this paving. Production shall be suspended if:

(1) The Profile Index exceeds the Profile Index which requires corrective work on pavements subject to mm/km (Inches/Mile) requirements; or

(2) The Profile Index exceeds the original Profile Index on pavements subject to Percent Improvement (%I) requirements.

Production shall remain suspended until the problem is identified and corrected. Each time production is suspended, corrective actions shall be proposed in writing by the Contractor and approved in writing by the Engineer before production may resume.

When production is resumed, the Contractor shall profile the pavement placed on the first day of paving after paving resumes and the conditions above for suspension of work shall apply.

The Contractor shall take sufficient profiles during construction to control the paving process.

The Contractor shall profile the finished pavement surface and determine a LPI for each lane using a 2.5 mm (0.1 inch) blanking band.

When incentive/disincentive payments are based on percent improvement, the Contractor shall also profile the original pavement surface and determine a LPI for each lane, before commencing work, using a 2.5 mm (0.1 inch) blanking band.

3. Bumps. All bumps that exceed 10 mm/7.6 m (0.4 inch/25 feet), shall be diamond ground until the bump does not exceed 10 mm/7.6 m (0.4 inch/25 feet). Additional diamond grinding shall be performed as necessary to extend the area ground in each lateral direction so that the lateral limits of grinding are at a constant offset from and parallel to the nearest lane line or pavement edge, and in each longitudinal direction so that the grinding begins and ends at lines normal to the pavement centerline within the ground area. All ground areas shall be neat rectangular areas of uniform surface.

The exact location of each bump shall be determined with a profilograph and the location marked on the pavement before diamond grinding commences. The area that is diamond ground shall also be checked with a profilograph after grinding is complete to ensure that the area now meets specifications.

Diamond grinding of bumps, including all necessary traffic control, shall be completed at the Contractor’s expense.

On asphalt pavements, the diamond grinding shall not reduce planned pavement thickness by more than7.5 mm (0.3 inches) and the entire ground area shall be covered with a fog seal coat when grinding is complete.

4. Corrective Work. When the Contract specifies pavement smoothness based on inches/mile or millimeters/kilometer the criteria for determining if corrective work is required is specified in Table 105-4 or Table 105-4SI. For asphalt pavements, when the Contract specifies pavement smoothness based on percent improvement, the criteria for determining if corrective work is required is specified in Table 105-5.

If the first LPI taken on the finished pavement surface exceeds the specified limit for corrective work, the lane shall be reprofiled and another LPI determined after all bumps exceeding feet 10 mm/7.6 m (0.4 inch/25) have been diamond ground. Corrective work will be required if the LPI still exceeds the specified limit.

If corrective work is required, the Contractor shall submit a written corrective work proposal to the Engineer which shall include the methods and procedures that will be used. The Contractor shall not commence corrective work until the methods and procedures have been approved in writing by the Engineer.

The Engineer’s approval shall not relieve the Contractor of the responsibility of producing work in conformity with the specifications.

Corrective work on concrete pavement shall consist of diamond grinding. Surface texture shall be restored using a diamond grinder after corrective work is complete.

Use of a rotomill, diamond grinder, feathering, scab patching, or any combination thereof will not be permitted for corrective work on asphalt pavements.

Corrective work on asphalt pavements shall consist of an approved overlay or removal and replacement. Corrective work on asphalt pavements shall conform to the following conditions:

A. Removal and replacement. The pavement in areas requiring corrective work shall be removed the full width of the lane and the full thickness of the course in accordance with subsection 202.09 Removal of Asphalt Mat (Planing).

The removal area shall begin and end with a transverse butt joint which shall be constructed with a transverse saw cut perpendicular to centerline. All replacement shall be made with approved hot bituminous mixtures that meet all contract requirements. Replacement material shall be placed in sufficient quantity so the finished surface will conform to grade and smoothness requirements. The corrective area shall be compacted to the specified density.

B. Overlay. The overlay shall cover the full width of the pavement including shoulders. The area overlaid shall begin and end with a transverse butt joint which shall be constructed with a transverse saw cut and asphalt removal. All material shall be approved hot bituminous mixtures that meet all contract requirements. The overlay shall be placed so the finished surface will conform to grade and smoothness requirements. The overlayed area shall be compacted to the specified density. The overlay thickness shall be equivalent to that of the final pass made in accordance with the plans and specifications.

When the corrective work is complete, the Contractor shall profile the corrective work area and determine a LPI. Bumps which exceed feet 10 mm/7.6 m (0.4 inch/25) shall be diamond ground in the corrective work area.

If the first LPI taken on the finished pavement surface in the corrective work area exceeds the specified limit for corrective work, the lane shall be reprofiled and another LPI determined after all bumps exceeding feet 10 mm/7.6 m (0.4 inch/25) have been diamond ground. Additional corrective work in accordance with this specification will be required if the LPI exceeds the specified limit.

Regardless of the corrective method used, the final product shall provide a pavement surface equal to adjacent sections not requiring corrective work.

All corrective work, including all necessary traffic control, shall be completed at the Contractor’s expense.

For concrete pavement, all corrective work shall be completed and accepted prior to determining pavement thickness in accordance with subsection 412.21, or sealing the joints in accordance with subsection 412.18.(b).

5 Final acceptance and incentive/disincentive payments for pavement smoothness will be made on a square yard or square meter basis in accordance with the following:

A. When the pavement is subject to an incentive/disincentive payment for pavement smoothness based on inches/mile or millimeters/kilometer the following applies:

Incentive payments will be based on the LPI using a 2.5 mm (0.1 in.) blanking band before diamond grinding of bumps or any corrective work has been done.

Disincentive payments will be based on the LPI using a 2.5 mm (0.1 in.) blanking band after the bumps that exceed feet 10 mm/7.6 m (0.4 inch/25) have been diamond ground and before any other corrective work has been completed.

Incentive/disincentive payments for Pavement Smoothness will be made in accordance with Table 105-4 or Table 105-4SI.

B. When the pavement is subject to an incentive/disincentive payment for asphalt pavement smoothness based on the Percentage of Improvement (%I), the following applies:

Incentive payments will be based on the %I of the LPI on the final paved surface before diamond grinding of bumps or any corrective work has been done compared to the LPI of the original surface.

Disincentive payments will be based on the %I of the LPI on the final paved surface after the bumps that exceed feet 10 mm/7.6 m (0.4 inch/25) have been diamond ground and before any other corrective work has been completed compared to the LPI of the original surface.

The %I will be calculated as follows:

%I = (LPI OF ORIGINAL SURFACE ‑ LPI OF FINAL SURFACE) X 100

LPI OF ORIGINAL SURFACE

Incentive/disincentive payments for Pavement Smoothness will be made in accordance with Table 105-5.

TABLE 105-4

PAVEMENT SMOOTHNESS

(INCHES/MILE)

0.1 INCH BLANKING BAND

PAVEMENT

SMOOTHNESS

CATEGORY¹

INCENTIVE

PAYMENTS²

DISINCENTIVE

PAYMENTS³

CORRECTIVE

WORK REQUIRED^{4 5}

LPI

(in./mi.)

Asphalt

$/SqYd

Concrete

$/SqYd

LPI

(in./mi.)

Asphalt

$/SqYd

Concrete

$/SqYd

LPI(in./mi.)

RURAL

INTERSTATE

8 or less

8.1-10

10.1-12

12.1-14

14.1-16

$0.10

$0.075

$0.05

$0.025

$0.00

$0.40

$0.30

$0.20

$0.10

$0.00

22.1-24

20.1-22

18.1-20

16.1-18

-$0.10

-$0.075

-$0.05

-$0.025

-$0.40

-$0.30

-$0.20

-$0.10

24.1 or more

ALL OTHER

HIGHWAYS WITH SPEED LIMITS EQUAL TO OR GREATER THAN 45 MPH

8 or less

8.1-10.6

10.7-13.3

13.4-16

16.1-18

$0.10

$0.075

$0.05

$0.025

$0.00

$0.40

$0.30

$0.20

$0.10

$0.00

25.6-28

23.1-25.5

20.6-23

18.1-20.5

-$0.10

-$0.075

-$0.05

-$0.025

-$0.40

-$0.30

-$0.20

-$0.10

28.1 or more

III ⁶

ALL HIGHWAYS WITH SPEED LIMITS LESS THAN 45 MPH

8 or less

8.1-11.7

11.8-15.4

15.5-18.0

18.1-20

$0.10

$0.075

$0.05

$0.025

$0.00

$0.40

$0.30

$0.20

$0.10

$0.00

29.1-34

26.1-29

23.1-26

20.1-23

-$0.10

-$0.075

-$0.05

-$0.025

-$0.40

-$0.30

-$0.20

-$0.10

34.1 or more

¹The pavement smoothness category will be shown on the plans.

²Incentive Payments will be based on the LPI before diamond grinding of bumps or any corrective work has been done.

³Disincentive payments will be based on the LPI after bumps have been diamond ground and before any other corrective work has been completed.

⁴Asphalt pavement - A disincentive of $0.10/SqYd will be applied in addition to the corrective work.

⁵Concrete pavement - A disincentive of $0.40/SqYd will be applied in addition to the corrective work

⁶ a. This category applies to the following asphalt pavement construction: (1) new construction; (2) complete reconstruction, including replacement of existing curb and gutter; (3) construction of more than one layer; (4) construction of one layer over an intermediate treatment; and (5) urban construction where smoothness is not affected by existing curb and gutter or numerous intersections. All other asphalt pavement construction where the speed limit is less than 45 mph is subject to percent improvement incentive/disincentive in accordance with Table 105-5.

b. This category applies to the following concrete pavement construction: (1) new construction; and (2) complete reconstruction. All other concrete pavement construction where the speed limit is less than 45 mph is not subject to incentive/disincentive; however, all bumps that exceed 0.4 inch/25 feet must be diamond ground until they are less than 0.4 inch/25 feet in accordance with these specifications.

TABLE 105-4SI

PAVEMENT SMOOTHNESS

(mm/km)

2.5 mm BLANKING BAND

PAVEMENT

SMOOTHNESS CATEGORY¹

INCENTIVE

PAYMENTS²

DISINCENTIVE

PAYMENTS³

CORRECTIVE WORK

REQUIRED^{4 5}

LPI

(mm/km)

Asphalt

$/m²

Concrete

$/m²

LPI

(mm/km)

Asphalt

$/m²

Concrete

$/m²

LPI

(mm/km)

RURAL

INTERSTATE

126 or less

126.1-158

158.1-190

190.1-222

222.1-252

$0.12

$0.09

$0.06

$0.03

$0.00

$0.48

$0.36

$0.24

$0.12

$0.00

347.1-378

332.1-347

384.1-315

252.1-284

-$0.12

-$0.09

-$0.06

-$0.03

-$0.48

-$0.36

-$0.24

-$0.12

378.1 and more

ALL OTHER HIGHWAYS WITH SPEED LIMITS EQUAL TO OR GREATER THAN 45 MPH (70 km/h)

126 or less

126.1-168

168.1-210

210.1-253

253.1-284

$0.12

$0.09

$0.06

$0.03

$0.00

$0.48

$0.36

$0.24

$0.00

403.1-446

363.1-403

324.1-363

284.1-324

-$0.12

-$0.09

-$0.06

-$0.03

-$0.48

-$0.36

-$0.24

-$0.12

446.1 or more

III⁶

ALL HIGHWAYS WITH SPEED LIMITS LESS THAN 45 MPH (70 km/h)

126 or less

126.1-185

185.1-243

243.1-284

284.1-315

$0.12

$0.09

$0.06

$0.03

$0.00

$0.48

$0.36

$0.24

$0.12

$0.00

457.1-504

410.1-457

363.1-410

315.1-363

-$0.12

-$0.09

-$0.06

-$0.03

-$0.48

-$0.36

-$0.24

-$0.12

504.1 and more

¹The pavement smoothness category will be shown on the plans.

²Incentive Payments will be based on the LPI before diamond grinding of bumps or any corrective work has been done.

³Disincentive payments will be based on the LPI after bumps have been diamond ground and before any other corrective work has been completed.

⁴Asphalt pavement - A disincentive of $0.12/m² will be applied in addition to the corrective work.

⁵Concrete pavement - A disincentive of $0.48/m² will be applied in addition to the corrective work

⁶a. This category applies to the following asphalt pavement construction: (1) new construction; (2) complete reconstruction, including replacement of existing curb and gutter; (3) construction of more than one layer; (4) construction of one layer over an intermediate treatment; and (5) urban construction where smoothness is not affected by existing curb and gutter or numerous intersections. All other asphalt pavement construction where the speed limit is less than 70 km/h is subject to percent improvement incentive/disincentive in accordance with Table 105-5.

b. This category applies to the following concrete pavement construction: (1) new construction; and (2) complete reconstruction. All other concrete pavement construction where the speed limit is less than 70 km/h is not subject to incentive/disincentive; however, all bumps that exceed (10 mm/7.6 m) must be diamond ground until they are less than (10 mm/7.6 m) in accordance with these specifications.

TABLE 105-5

ASPHALT PAVEMENT SMOOTHNESS

PERCENT IMPROVEMENT (%I)

2.5mm (0.1 INCH) BLANKING BAND

INCENTIVE PAYMENTS¹			DISINCENTIVE PAYMENTS²			CORRECTIVE WORK REQUIRED³
%I	$/Sq.Yd.	$/m²	%I	$/Sq.Yd.	$/m²	%I
MORE THAN 75.0	$0.10	($0.12)	20.1-26.2	-$0.10	-($0.12)	20.0 OR LESS
70.1-75.0	$0.075	($0.09)	26.3-32.5	-$0.075	-($0.09)
65.1-70.0	$0.05	($0.06)	32.6-38.8	-$0.05	-($0.06)
55.1-65.0	$0.025	($0.03)	38.9-45.0	-$0.025	-($0.03)
45.1-55.0	$0.00	($0.00)

¹Incentive payments will be based on the LPI before diamond grinding of bumps or any corrective work has been done.

²Disincentive payments will be based on the LPI after bumps have been diamond ground and before any other corrective work has been completed.

³A disincentive of $0.12/m²($0.10/sq. yd.) will be applied in addition to the corrective work.

(c) Smoothness Requirements for the work items: Removal of Asphalt Mat (Planing), Heating and Scarifying, Cold Bituminous Pavement Recycle, Heating and Repaving, and Heater Remixing.

1. Testing procedures. A LPI shall be determined for each lane on the original pavement surface prior to beginning the work, using a 5 mm (0.2 inch) blanking band in accordance with CP 64.

A LPI shall be determined for each lane on the pavement surface after the work is complete using a 5 mm (0.2 inch) blanking band.

2. Final pavement smoothness acceptance will be made as follows: Lanes with a LPI after the work is completed which is greater than the LPI prior to performing the work shall be corrected by a method approved in writing by the Engineer until the LPI is no greater than the LPI prior to performing the work.

All corrective work shall be at the Contractor’s expense including all traffic control necessary for completion of the corrective work and the additional HBP necessary to replace any asphalt removed during the corrective work.

Subsection 202.09 shall include the following:

The longitudinal surface smoothness of the roadway prior to and after planing shall be tested in accordance with subsection 105.031(c).

Delete subsection 401.20 and replace with the following:

401.20 Surface Smoothness. The roadway surface smoothness shall be tested in accordance with subsection 105.031. If not specified otherwise on the plans, the roadway surface shall be subject to mm/km (inches per mile) requirements for Category I, Rural Interstate Highway, in accordance with Table 105-4 (Table 105-4SI).

Subsection 405.03 shall include the following:

The longitudinal surface smoothness of the roadway prior to and after heating and scarifying shall be tested in accordance with subsection 105.031(c).

406.11 Smoothness. The longitudinal surface smoothness of the roadway prior to and after cold recycling shall be tested in accordance with subsection 105.031(c).

Delete subsection 412.17 and replace with the following:

412.17 Surface Smoothness. The roadway surface smoothness shall be tested in accordance with subsection 105.031. If not specified otherwise on the plans, the roadway surface shall be subject to mm/km (inches per mile) requirements for Category I, Rural Interstate Highway, in accordance with Table 105-4 (Table 105-4SI).