-
The Modification to Existing Surveillance Cabinet detail on DWG page 66 appears to show an existing Solar powered cabinet, but does not include any of the new required Detection Integration Devices, Controllers, or Linux Controllers. Will the engineer provide correct detailed cabinet drawings prior to bid?
The project should be bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/20/2026)
-
Please confirm Railroad protective insurance will be required for Indiana Harbor Belt 5140+00, CTA 5298+00, CSX 5302+00 and Belt RR of Chicago 5501+00?
The project should be bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/20/2026)
-
Is the quantity of Mainline Fiber splice 1 ea. X8710306
able to be increased and please provide the location of this 1 ea. item?
The project should be bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/20/2026)
-
Is the new 96F cable to be brought into the TSC building? If so, what is the scope of the work to be performed in the building?
The 96F cables will terminate within proposed fiber optic interconnect centers within the TSC building Computer Room. (04/17/2026)
-
Will IDOT provide individual cabinet drawings for the 67 cabinets to be modified?
The project should be bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/17/2026)
-
What is the length of the 2" CONDUIT RISER, GALVANIZED STEEL X0327752?
The pay item for the area within the load transfer platform is X2070304 POROUS GRANULAR EMBANKMENT (SPECIAL). The pay item for the area between the top of the load transfer platform and the roadway section is 20700220 POROUS GRANULAR EMBANKMENT. Plans will be updated accordingly in a construction revision. (04/15/2026)
-
There are 730 days of traffic control surveillance on this job. Is it for the temp lane closures?
The project should be bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/15/2026)
-
If layout is incidental to the wood poles, please revise the special provisions to include that work since it is currently not included.
The project should be bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/15/2026)
-
The maintenance item is not quantifiable to bid due to the lack of clarity in the duration of the contract (see RE field office vs. contract date). Please consider making maintenance an allowance as per other industries
The project should be bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/15/2026)
-
Please consider making the Maintenance of Traffic Surveillance item a MONTH instead of LUMP SUM. The contactor cannot reasonable estimate the maintenance needs of the entire system
An addendum will be issued to address this question. Please continue to monitor the website for an update.
(04/14/2026)
-
What are the locations of "TERMINATE FIBER IN CABINET" X1400217 288 ea.?
These terminations occur in the following locations:
• 192 each at the TSC building
• 96 each at the cabinet at the west limit
(04/14/2026)
-
What is the purpose of 730 cal days of Surveillance if the lane closures are nightly.
This pay item will be removed in the addendum. Please continue to monitor the website for an update. (04/14/2026)
-
Please confirm that IDOT has completed all the CDOT requirements for design in accordance with CDOT Rules & Regulations regarding the IR process for design requirements
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/14/2026)
-
Will the trees and vegetation be removed prior to the start of work?
Quantities for tree removal and clearing and grubbing will be included in an addendum. Please continue to monitor the website for an update. (04/14/2026)
-
Please provide the following information related to pay item X7010007 MAINTENANCE OF EXISTING TRAFFIC SURVEILLANCE:
1. Approximately how many traffic loops need to be replaced annually?
2. On average, how many dispatch / emergency calls does IDOT receive annually?
3. What is the typical nature of repairs required for dispatch / emergency calls for this system?
4. On average, how many JULIE / Illinois One-Call tickets does IDOT receive for locating existing utilities on this system annually?
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/14/2026)
-
What is the duration in months for pay item X7010007 MAINTENANCE OF EXISTING TRAFFIC SURVEILLANCE, 1 LSUM that contractor is expected to maintain the system?
The duration of maintenance shall be 24 months. (04/14/2026)
-
The contract duration is 135 working days which is approximately 6-7 months. However, pay item X6700407 ENGINEERS FIELD OFFICE is for 24 calendar months. Is it IDOT's intent to keep this contract open for an additional 17-18 months after contractor's work is complete?
The duration of the contract is anticipated to be 24 months based on material lead times, coordination with adjacent contracts, and maintenance after the main construction effort. (04/14/2026)
-
What is the basis of design manufacturer for pay item X0325922 CELLULAR MODEM?
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/14/2026)
-
What is the basis of design manufacturer for pay item X0325489 CONTROLLER, LINUX, ATC?
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/14/2026)
-
Please confirm that Down guys will only be required at Dead end poles.
Guy wires shall be provided as necessary to support wood poles and attached cables. See details on Sheet 59. (04/13/2026)
-
How will Survey and Layout be paid?
ITS layout is included in the cost of the Wood Poles, of the length and class indicated. (04/13/2026)
-
Please advise where the designer feels this project will be in conflict with the CTA ROW. Plans do not appear to show any construction within CTA ROW requiring flagging, rail safety training, track access occurrences, insurance, etc. noted in the CTA FLAGGING AND COORDINATION, CTA REQUIREMENTS, or RAILROAD PROTECTIVE LIABILITY INSURANCE special provisions.
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/10/2026)
-
Please confirm that Testing and disposal for unsuitable/ Nonspecial waste will be required on this contract.
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/09/2026)
-
Has the designer confirmed that each existing cabinet has the space and power required to accommodate the new equipment that is to be installed?
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/09/2026)
-
Please provide a soil boring for the Rock Excavation shown to be performed on Sheets 11 and 12.
Rock Excavation is shown on the north side of I-290 west of Mannheim Road. It is shown in the callouts for wood poles between STA 5081+54 and STA 5101+79. We do not have any borings for this area. The entire length of pole of embedded is required due to exposed rock in this area. (04/08/2026)
-
In reviewing the plans, it appears there is a quantity of 70 not 67 for the following line items:
Controller, Linux, ATC
Cellular Modem
Detection Integration Device
Detection Controller
Ethernet Manage Switch
Please double check and advise.
Thank you!
70 is the correct quantity for pay items X3205489, X0325922, X1400413, X1400414, and Network Access, Switch. We'll update these quantities in the addendum. Please continue to monitor the website for an update. (04/08/2026)
-
Sheets 55 through 58 are exactly the same sheet. Please advise if this is correct.
An addendum will be issued to address this question. Please continue to monitor the website for an update. (04/08/2026)
-
Will City of Chicago permit fees (ROW, OUC, Deep Excavation, etc.) be waived? If not will contractor be paid for costs incurred? Recommend adding an allowance pay item for City of Chicago permit fees.
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/07/2026)
-
Please create an allowance or specify a dollar amount contractors should carry in the bid for the cost of CDOT permits. CDOT will not provide contractors the cost of permits at bid time.
The contractor should bid according to the Standard Specifications for Road and Bridge Construction, Highway Standards, and the plans and specifications available online. (04/03/2026)