KDOT Safety Regulations & Compliance 2 — Questions and Answers
Question 1: Under KDOT's work zone safety requirements, what minimum distance must a flagger be stationed from the nearest lane taper when controlling traffic?
- 100 feet
- At the end of the taper (Correct answer)
- 50 feet beyond the taper
- At the beginning of the buffer zone
Correct answer: At the end of the taper
Flaggers must be stationed at the end of the taper so drivers can see the flag signal before entering the transition area.
Question 2: Which federal regulation governs the permissible exposure limits (PELs) for silica dust that KDOT inspectors must enforce on road construction sites?
- EPA 40 CFR Part 61
- OSHA 29 CFR 1926.1153 (Correct answer)
- FHWA 23 CFR Part 635
- KDOT Special Provision SP-2020-1
Correct answer: OSHA 29 CFR 1926.1153
OSHA 29 CFR 1926.1153 sets the construction industry PEL for respirable crystalline silica at 50 µg/m³ as an 8-hour TWA.
Question 3: A contractor's employee refuses to wear a hard hat in a posted hard-hat zone. What is the KDOT inspector's first required action?
- Issue a formal stop-work order immediately
- Notify the contractor's superintendent to correct the violation (Correct answer)
- File a KDOT safety incident report within 24 hours
- Contact OSHA directly
Correct answer: Notify the contractor's superintendent to correct the violation
The inspector must first notify the contractor's superintendent to correct the PPE violation before escalating to a stop-work order.
Question 4: According to KDOT standards, what color vest must construction workers wear when operating within 15 feet of moving traffic?
- Class 1 yellow vest
- Class 2 orange-red vest
- Class 3 high-visibility vest (Correct answer)
- Any reflective safety vest
Correct answer: Class 3 high-visibility vest
Workers within 15 feet of moving traffic must wear ANSI/ISEA Class 3 high-visibility vests because they provide maximum conspicuity.
Question 5: When must a KDOT inspector complete a safety inspection of a trench excavation deeper than 5 feet?
- Once per day before work begins
- At the start of each shift and after any event that could affect stability (Correct answer)
- Weekly and after any rain event
- Only when the contractor requests an inspection
Correct answer: At the start of each shift and after any event that could affect stability
OSHA 29 CFR 1926.651 requires a competent person to inspect excavations at the start of each shift and after any event that could increase hazard.
Question 6: What is the KDOT-required minimum setback distance for temporary concrete barriers (TCBs) from the edge of the travel lane?
- 6 inches
- 12 inches
- 2 feet
- Flush with the lane edge (Correct answer)
Correct answer: Flush with the lane edge
KDOT specifies that TCBs are placed flush with the edge of the designated travel lane to maintain lane width while providing worker protection.
Question 7: Under Kansas law, who bears primary responsibility for complying with all applicable safety regulations on a KDOT construction project?
- The KDOT resident engineer
- The prime contractor (Correct answer)
- The KDOT safety officer
- The project subcontractor performing the hazardous work
Correct answer: The prime contractor
The prime contractor is responsible for safety compliance for all work on the project, including subcontractor activities.
KDOT Safety Regulations & Compliance 2
Under KDOT's work zone safety requirements, what minimum distance must a flagger be stationed from the nearest lane taper when controlling traffic?