CPD CPD Traffic Enforcement & Vehicle Operations

Question 1

Under Illinois law, what is the legal blood alcohol concentration (BAC) limit for non-commercial drivers aged 21 and older?

Accepted Answer

0.08%

Answer

0.10%

Answer

0.05%

Answer

0.04%

Question 2

When conducting a traffic stop, how should a CPD officer position their patrol vehicle relative to the stopped vehicle?

Accepted Answer

10–15 feet behind and offset to the left

Answer

Directly behind bumper-to-bumper

Answer

30 feet behind in the center lane

Answer

Alongside the driver's door

Question 3

What does the Horizontal Gaze Nystagmus (HGN) field sobriety test detect?

Accepted Answer

Involuntary eye jerking caused by alcohol impairment

Answer

Visual acuity and depth perception

Answer

Balance and coordination deficits

Answer

Reaction time and cognitive speed

Question 4

Under Illinois's Implied Consent Law, what consequence does a driver face for refusing a chemical test?

Accepted Answer

Automatic statutory summary suspension of driving privileges

Answer

A $500 fine with no license action

Answer

Mandatory 30-day jail term

Answer

Community service requirement only

Question 5

What is the first action a CPD officer should take when a vehicle fails to yield during a traffic stop attempt?

Accepted Answer

Notify dispatch of the vehicle description and direction of travel

Answer

Immediately pursue at maximum speed

Answer

Block the vehicle with the patrol car

Answer

Call for backup and stage in place

Question 6

Which Illinois statute is the primary legal authority for traffic laws that CPD officers enforce?

Accepted Answer

625 ILCS 5 – Illinois Vehicle Code

Answer

720 ILCS 5 – Criminal Code of 2012

Answer

730 ILCS 5 – Unified Code of Corrections

Answer

55 ILCS 5 – Counties Code