To Protect or not To Protect
Does the MBGF end have to be flared?
No, it CAN be flared 25:1 but doesn’t have to be.
When using low profile barrier, what must the speed limit be in that area?
45 mph or less
Give an example of a vegetative method for stabilization?
temporary warm, temporary cool, permanent seeding
When installing a cabinet controller base, is Class C concrete preferred by TxDOT?
No, Standard TS-CF-21, Note 1, states to use a base manufactured of a polymer concrete mixture. This will be a prefabricated base, marked with the manufacture's information.
What is the minimum height for a sign on the side of the roadway?
7 feet measured from the edge of the travel lane, not the location of the sign stub.
What can cause the bolts on MBGF to loosen at the end of a project?
Weather
Can precast curb be used under a Thrie Beam?
Yes
How much is a potential violation found by TCEQ?
$25,000 per day per violation
Before a contractor starts drilling for a signal pole foundation, name one of the three entities to be contacted to determine if existing utility lines are in conflict?
ONE CALL, MUNICPALITIES, or TXDOT
What color of sign is used for destination/guidance?
Green background with white letters.
Name two of the different types of barrier discussed?
MBGF, Low Profile CTB, Portable and Permanent CTB, Cable Barrier, Bridge Rail and Temporary Steel Barrier.
Can you place washers on the face of MBGF?
No, bolts on posts are designed to pull through face of rail.
What item specifies seed mixtures and optimum seeding times for each district.
Item 164 - Seeding for Erosion Control - specifies the different type of seed mixtures and seeding times for each district. Item 164- 2024 spec.
What is the Item number for Highway Traffic Signals?
Item 680
What is the best tool to use to collect a sample when checking thermoplastic striping?
Metal plates/ metal reflective foil tape or metal duct tape. Regular duct tape will shrink with heat from thermoplastic markings.
What does MASH stand for?
Manual on Assessing Safety Hardware.
How many toe nails are required on a Rectangular wood post with a wood block out?
One, though most contractors use 2
True of False. Vegetation is needed to protect the soil from raindrop impacts.
True
Where would you find specific information about the type of traffic controllers used on a project?
GENERAL NOTES
How many sides or what is the shape of a STOP sign?
Octagon or has 8 sides
When grading for the guardrail terminal, what is the maximum slope allowed?
10:1 or flatter
If placing concrete barrier rail, why is it important to know the direction of the pavement slope?
During rain events, the water may pond if drain slots are not placed appropriately or block outs not removed.
Is fertilizer a pay item in the plan set?
No, unless specified in the plans
True/False – The two types of electrical services that can be installed on a TxDOT project are Pedestal or Pole mounted.
True
Name one of the requirements checked when inspecting thermoplastic striping?
thickness, width, length, reflectivity