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SPS Feedback Report SummariesFor additional information e-mail: ltppinfo@fhwa.dot.gov. Report Number: BRE-6 Subject/IMS Table: SPS5_LAYER table has
incorrect layer structures. LTPP Analysis/Operations Situation: In the SPS5_LAYER table, section 040504 has an asphalt-treated subbase noted as 0 inches thick. The treated subbase is directly below the granular base layer. Is this allowable? Why record it at all if thickness is 0 inches thick? The SPS5_LAYER table, sections 240502 and 240506 have an asphalt binder layer above the original surface layer with a thickness of 0 inches. In the SPS5_LAYER table sections 810502, 810508 and 810509 have an asphalt-treated base below the original surface (which has a thickness greater than 0 inches) which has a thickness of 0 inches. Resolution of Problem/Situation: The SPS5_LAYER table data was reviewed by the North Atlantic and Western Regional Offices and the necessary corrections were made. Report Number: BRE-14 Subject/IMS Table: Apparent overlay for
section 087780 not fully accounted for in EXPERIMENT_SECTION and
TEST_L05B tables. LTPP Analysis/Operations Situation: Section 087780 in Colorado is in GPS experiment 1 according to the EXPERIMENT_SECTION table. In TST_LO5B however, it has an overlay. There is no construction event number 2 in either table. The EXPERIMENT_SECTION table should be updated to put the section in experiment GPS-6B. Resolution of Problem/Situation: The Western Regional Office has made the necessary correction in the data base. Report Number: BRE-17 Subject/IMS Table: Absence of overlay data for
supplemental SPS-6 test sections. LTPP Analysis/Operations Situation: Overlay data for supplemental SPS-6 test sections is incomplete. It does not contain all of the test sections. Resolution of Problem/Situation: Data for supplemental sections cannot be fully accommodated by the IMS rehabilitation tables. LTPP policy was that data for supplemental sections would be included to the extent that the IMS tables could accommodate them, but that no new tables would be created for supplemental test sections. Report Number: BRE-18 Subject/IMS Table: Absence of pre-milling
elevation measurements for Florida SPS-5
project. LTPP Analysis/Operations Situation: The SPS-5 in Florida does not appear to have any elevation measurements prior to milling of the test sections. This will affect the calculation of the overlay thickness to determine if it meets the requirements for the SPS-5. The Regional Office needs to make sure that all available data for the level surveys have been entered into the data base. A general comment may need to be added to the data base regarding the lack of data, if no elevation measurements were taken prior to milling. Resolution of Problem/Situation: Data is not available. No elevation measurements were taken prior to milling. Report Number: BRE-19 Subject/IMS Table: Absence of post milling
elevation measurements for SPS-5 project in
Georgia. LTPP Analysis/Operations Situation: The SPS-5 in Georgia does not have any elevation shots between the milling of the porous friction course and the milling of the sections that were supposed to be milled. The milling of the porous friction course and the required milling may have been done at the same time, or they could have been done in two separate passes of the milling machine. The Regional Office should check to see if elevation measurements were taken between the milling of the porous friction course and the milling of the sections that were supposed to be milled. Resolution of Problem/Situation: Data is not available. No elevation measurements were taken between the milling of the porous friction course and the milling of the intensive surface preparation sections. Report Number: BRE-21 Subject/IMS Table: Inconsistent mill/mill
replacement data for Colorado SPS-5 sections 506-509 in the
SPS5_MILLED_SECTIONS table. LTPP Analysis/Operations Situation: Substantial milling (53 to 56 mm) is reported for the milled test sections (080506-080509) on the SPS-5 in Colorado, but no mill replacement layer is reported. The overlay thickness for these test sections are much lower than the planned values. It appears that the mill replacement layer may have been omitted from the SPS5_MILLED_SECTIONS table. Resolution of Problem/Situation: Layer data has been corrected in the table SPS5_MILLED_SECTIONS. Report Number: BRE-22 Subject/IMS Table: Improbable consistency in
average depths of milling for Maine SPS-5 project in the
SPS5_MILLED_SECTIONS table. LTPP Analysis/Operations Situation: All average depths of milling for the Maine SPS-5 project are reported as 38 mm. This uniformity appears unlikely and raises the question of whether these were measured or estimated. The Regional Office should determine if these values are measured or estimated and add a comment to the data base stating which is the case. Resolution of Problem/Situation: The data in the SPS5_MILLED_SECTIONS table is correct and complete. Report Number: BRE-23 Subject/IMS Table: Inconsistent information on
milling for test section 503 of New Jersey SPS-5
project. LTPP Analysis/Operations Situation: Test section 340503 for the New Jersey SPS-5 project is reported to have 66 mm of mill replacement, although it was not milled. In addition, the milling depths are reported to be 25 mm. The Regional Office should determine if these values are measured or estimated and add a comment to the database stating which is the case. It is possible than the 66 mm of mill replacement is actually a binder course. This should be checked. There is a place to record binder thickness in the SPS5_LAYER_THICKNESS table. Resolution of Problem/Situation: Data has been corrected as necessary. Report Number: BRE-24 Subject/IMS Table: No milling data for
sections that should have been milled on Manitoba SPS-5
project. LTPP Analysis/Operations Situation: The data for the Manitoba SPS-5 indicates that the sections 830506-830509 were not milled. The Regional Office should determine if these sections were milled or not. If they were not milled, they should be commented. Resolution of Problem/Situation: SPS Construction Data Sheet 6 has been completed and entered into the database. Rehabilitation Sheet 64 forms were created to document the milling activity as required. Report Number: BRE-25 Subject/IMS Table: Overlay of California SPS-5
control section reported in construction report but not reflected
in database. LTPP Analysis/Operations Situation: A 51 mm recycled asphalt pavement overlay was placed on the control section of the California SPS-5 project, although it was not to have been overlaid. The Regional Office should add data to the data base showing that this section has been overlaid. Resolution of Problem/Situation: Data has been corrected as necessary. Report Number: BRE-26 Subject/IMS Table: Data on leveling course in
construction report for Colorado SPS-5 control section that is not
reflected in database. LTPP Analysis/Operations Situation: A 33 mm rut level-up course was placed on the control section of the Colorado SPS-5 project. This fact was found in the construction report, but there is no data in the database showing the overlay. Resolution of Problem/Situation: Data has been corrected as necessary. Report Number: BRE-60 Subject/IMS Table: Control section on project
48A5XX found in SPS review. LTPP Analysis/Operations Situation: The final report for this project mentions that 48A5XX is co-located with both GPS section 481069 and SPS-3 project 48B3XX. The report mentions that both the GPS section and the SPS-3 control section can be used as controls for the SPS-5 project and no control section was included in the SPS-5 project. It turns out that the SPS-3 control is located closer to the SPS-5 than the GPS section. Furthermore the SPS-3 control is allowed to receive less maintenance than the GPS section. On the other hand, the GPS section has more testing information than the SPS-3 project. There is no way for a user to know that the SPS-3 control section may be a good choice to use as the control for the SPS-5. Resolution of Problem/Situation: IMS SPR 3-625 submitted to allow GPS/SPS link table to recognize the SPS-3 and SPS-5 control section as same (48A501 as 48B340). Report Number: EBA-3 Subject/IMS Table: Inappropriate SHRP_IDs for
SPS-9 supplemental sections. LTPP Analysis/Operations Situation: LTPP IMS convention starts numbering SPS supplemental sections at xx59 on whatever project they exist, (SPS-3 and -4 excluded). Six SPS projects have distress records and EXPERIMENT_SECTION (EXS) entries which do not conform to this: 180900, 270900, 310900, and 550900, 55A900 and 55B900. This is not thought to affect any quality control (QC). The EXS QC considers all of these sections supplemental. Determine the amount of effort to reconcile these projects with general LTPP practice to include the need to annotate a number of raw data files, distress maps, scope of QC revisions, etc. Resolution of Problem/Situation: This issue has been addressed in IMS Directive I-76 regarding the differentiation of SPS-9 projects and sections. The EXPERIMENT_SECTION QC has also been revised to accommodate these sections. Report Number: ERES-BW-31 Subject/IMS Table: Missing data in table
SPS_2_PCC_JOINT_DATA. LTPP Analysis/Operations Situation: Information useful for faulting analysis (i.e., spacing, skewness, dowel diameter, dowel distance, dowel coating, etc.) is missing from the SPS2_PCC_JOINT_DATA table with file extension 211. Recommend the Regional Offices contact the States to collect the design or as-built information for the section with missing data. Resolution of Problem/Situation: Resolved as recommended. Report Number: ERES-BW-32 Subject/IMS Table: Missing data in table
SPS_8_PCC_JOINT_DATA. LTPP Analysis/Operations Situation: The ROUND_DOWEL_DIAMETER is missing from the SPS8_PCC_JOINT_DATA table with file extension 811. Contact the States to collect the design or as-built information for the section with missing data. Resolution of Problem/Situation: Resolved as recommended. Report Number: ERES-BW-38 Subject/IMS Table: Missing data in tables
SPS6_PCC_FULL_DEPTH and
SPS6_UNDERSEALING. LTPP Analysis/Operations Situation: For SPS-6 experiment sections, information is needed regarding the location of full-depth patching or undersealing in order to account for rehabilitation effects on joint faulting values. IMS tables SPS6_PCC_FULL_DEPTH and SPS6_UNDERSEALING do not contain such information. Contact the States to collect the design or as-built information for the section with missing data. Resolution of Problem/Situation: The data requested is not an IMS entry. Information may be available in the construction reports. Report Number: ERES-BW-53 Subject/IMS Table: Correct deficiencies in
regional information management system (RIMS) databases to make
SPS data releasable in table
EXPERIMENT_SECTION LTPP Analysis/Operations Situation: There is a lack of releasable SPS-6 data and some GPS-7 and GPS-9 data. Zero to very limited amounts of releasable data for the portland cement concrete (PCC) rehabilitated sections. This includes SPS-6 sections for 04 (AZ), 05 (AR), 06 (CA), 17 (IL), 18 (IN), 19 (IA), 26 (MI), 29 (MO), 40 (OK), 42 (PA), 46 (SD), and 47 (TN). Also a number of GPS sections. No data is available from the IMS for International Roughness Index (IRI), FWD, distress (manual and PASCO), faulting, and traffic. Some data is currently at level E within these individual tables, but is not releasable in other tables such as EXPERIMENT_SECTION. Resolution of Problem/Situation: Most of this problem was resolved with the data resolution effort and the EXPERIMENT_SECTION QC in the early part of 1999. Data from the North Central Regional Office is now available for public release, except for the TST_L05* data from the SPS-6 in Indiana (18). The North Central Regional Office has repeatedly requested construction information for the Indiana SPS-6 and is working with the Agency to collect the data. The construction data for the new SPS-6 built in Missouri in 1998 is also outstanding, but that data should be available and in the RIMS May 1, 2001. Report Number: ERES-BW-128 Subject/IMS Table: Recommendations for future
data collection and analyses for the SPS-8 experiment
LTPP Analysis/Operations Situation: As part of the initial evaluation of the SPS-8 experiment, needs for additional data collection and analyses were identified. A summary of the recommended future data collection and analysis efforts was provided. Additional data collection and analyses for the SPS-8 experiment should be considered by FHWA and implemented as appropriate. Resolution of Problem/Situation:Additional SPS-8 projects/sections cannot be added to the program. Traffic and materials data deficiencies are being addressed as part of a pooled fund study and action plan, respectively. New data collection activities will be pursued only if the new Federal 2004 Transportation Bill provides sufficient funding. Future analysis recommendations will be addressed outside the feedback report process. Report Number: ERES-BW-131 Subject/IMS Table: Additional recommendations
as a result of SPS-8 review study. (In addition to recommendations
submitted in feedback report ERES_BW-128)
LTPP Analysis/Operations Situation: Additional recommendations, as a result of SPS-8 review study. (In addition to recommendations submitted in feedback report ERES_BW_128.) Resolution of Problem/Situation: A pooled fund study has been started to address the traffic data collection issues. It is unlikely that funds will be sufficient to address collecting traffic data in the passing lane. Some SPS-1 and -2 traffic data may have been provided by the agencies, however this data has not been processed and is not in the database. SPS-8 test sections are now over 8 years old and diamond grinding is not felt to be appropriate, nevertheless, FHWA will explore this issue with Texas DOT.
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This page last modified on 03/22/07 |
