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Question 1. Which map source can be imported into Synchro to provide a georeferenced background for network construction? A) Google Street View B) Bing Maps imagery C) OpenStreetMap XML file D) PDF scanned map Answer: B Explanation: Synchro supports importing Bing Maps imagery, which is georeferenced and can be scaled to match real‑world coordinates. Question 2. When scaling a CAD background image, which parameter must be entered to align the image correctly with the network? A) Pixel resolution B) Latitude/Longitude of two known points C) Map projection code D) Image file size in MB Answer: B Explanation: Scaling requires the latitude/longitude of at least two reference points on the CAD file to compute the correct scale factor. Question 3. In Synchro, a “through lane” is defined as: A) A lane that only allows left turns B) A lane that permits vehicles to travel straight through the intersection C) A lane reserved for bicycles D) A lane used exclusively for U‑turns
Answer: B Explanation: Through lanes are designed for vehicles that continue straight across the intersection without turning. Question 4. What is the purpose of coding a “pocket lane” in a Synchro link? A) To increase the link’s speed limit B) To provide a temporary storage area for turning vehicles C) To reduce the length of the link D) To designate a lane for emergency vehicles only Answer: B Explanation: Pocket lanes are short lane segments that allow turning vehicles to wait without blocking through traffic. Question 5. When modeling a curved link, which geometric attribute must be entered? A) Radius of curvature B) Number of traffic signals on the curve C) Pedestrian crossing count D) Lane width only Answer: A Explanation: The radius of curvature defines the shape of the curve and affects vehicle speed and capacity calculations. Question 6. How are median strips represented in Synchro’s network geometry?
Explanation: Node coordinates can be directly edited to improve alignment with the real‑world geometry. Question 9. Which traffic mode is NOT directly entered in Synchro’s demand input screen? A) Passenger cars B) Heavy trucks C) Bicycles D) Autonomous drones Answer: D Explanation: Synchro supports cars, trucks, pedestrians, and bicycles, but not autonomous aerial drones. Question 10. The Peak Hour Factor (PHF) is used to: A) Convert daily traffic counts to hourly volumes B) Adjust the peak‑hour volume for fluctuations within the hour C) Determine the number of lanes needed at an intersection D) Calculate the saturation flow rate automatically Answer: B Explanation: PHF = (Peak 15‑minute volume) / (4 × Peak hour volume) and accounts for uneven arrival patterns within the peak hour. Question 11. If the observed PHF for a corridor is 0.85, what does this indicate about traffic flow? A) Traffic is perfectly uniform throughout the hour B) There is a high degree of fluctuation, with peaks exceeding the average C) The corridor is oversaturated and requires additional lanes
D) The saturation flow rate must be increased by 15% Answer: B Explanation: A PHF less than 1.0 shows that traffic arrivals are uneven, with short periods of higher demand. Question 12. Saturation flow rate in Synchro is expressed as: A) Vehicles per hour per lane B) Vehicles per second per lane C) Pedestrians per minute D) Trucks per hour Answer: B Explanation: Saturation flow is typically measured in vehicles per second per lane (v/s/ln) and reflects the maximum discharge rate under ideal conditions. Question 13. When adjusting saturation flow for a location with a high percentage of heavy trucks, the user should: A) Increase the default saturation flow value B) Decrease the default saturation flow value C) Keep the default value unchanged D) Switch to a pedestrian saturation flow Answer: B Explanation: Heavy trucks occupy more space and reduce the discharge rate, so the saturation flow should be lowered.
Answer: B Explanation: TripGen integrates ITE Trip Generation Manual methods to create trips for development projects. Question 17. Which of the following is NOT a step in the TripGen workflow? A) Trip generation based on land‑use type B) Traffic signal phasing design C) Trip distribution using a gravity model D) Trip assignment to network links Answer: B Explanation: Signal phasing is performed after demand is assigned; TripGen focuses on generation, distribution, and assignment. Question 18. When entering multimodal volumes, the “Pedestrian” input field represents: A) Number of pedestrians per hour crossing the intersection B) Number of bicycles that share the roadway C) Number of vehicles that have pedestrians onboard D) Number of traffic signals that allow pedestrian phases Answer: A Explanation: The pedestrian field captures the hourly pedestrian crossing volume for the intersection. Question 19. A “Pre‑timed” controller in Synchro operates based on: A) Real‑time detector data B) Fixed cycle length and phase splits throughout the analysis period
C) Adaptive algorithms that adjust to congestion D) Randomized phase sequences Answer: B Explanation: Pre‑timed controllers use a constant cycle and fixed green times, independent of detector inputs. Question 20. Which controller type can extend green time when a detector is activated? A) Pre‑timed B) Actuated C) Fixed‑time only D) Manual Answer: B Explanation: Actuated controllers use detectors to extend or terminate phases based on real‑time demand. Question 21. In Synchro, a “Semi‑actuated” controller differs from a fully actuated controller because: A) Only the minor approaches have detectors, while the major approach has a fixed green B) All approaches have detectors but no extension logic C) It uses a variable cycle length that changes every minute D) It does not support pedestrian phases Answer: A Explanation: Semi‑actuated controllers have detectors on minor approaches; the major approach receives a guaranteed minimum green.
Answer: A Explanation: Yellow Change (amber) follows green and precedes the all‑red interval, warning drivers of the impending stop. Question 25. According to MUTCD, the minimum walk interval for a pedestrian crossing is: A) 5 seconds B) 7 seconds plus 0.5 seconds per foot of crossing width C) 10 seconds for all crossings D) 3 seconds per lane of traffic Answer: B Explanation: MUTCD specifies Walk = 7 s + 0.5 s per foot of crossing width to ensure adequate crossing time. Question 26. In Synchro, detector “extension” logic means: A) The green phase is prolonged while a vehicle is present on the detector B) The detector automatically adds a new lane to the link C) The detector records pedestrian counts only D) The detector reduces the cycle length Answer: A Explanation: Extension adds green time as long as a vehicle occupies the detector, up to a programmed maximum. Question 27. “Gap‑out” logic in an actuated controller terminates a phase when:
A) No vehicle is detected for a preset gap time after the last vehicle has passed the detector B) The detector records a pedestrian crossing request C) The cycle length reaches its maximum value D) The left‑turn phase has completed Answer: A Explanation: Gap‑out ends the green when the detector sees no vehicle for the defined gap, allowing the cycle to progress. Question 28. The Highway Capacity Manual (HCM) 7th Edition defines Level of Service (LOS) for signalized intersections primarily based on: A) Vehicle delay per vehicle (seconds) B) Number of lanes on the major street C) Pedestrian crossing width D) Fuel consumption Answer: A Explanation: HCM LOS for signalized intersections is expressed as average control delay per vehicle. Question 29. In Synchro’s “Percentile Delay” method, the reported delay corresponds to: A) The 50th percentile of vehicle delays (median) B) The 85th percentile of vehicle delays C) The average of all vehicle delays D) The maximum observed delay Answer: B
C) Length of the roundabout’s central island D) Presence of pedestrian push‑buttons Answer: B Explanation: Roundabout capacity depends on the circulating flow and the sum of entry flows that conflict with it. Question 33. A “green wave” is achieved by adjusting: A) Cycle length only B) Offsets between adjacent signals to match vehicle travel speed C) Pedestrian walk intervals to be simultaneous at all approaches D) Detector placement on each approach Answer: B Explanation: Offsets are timed so that a platoon of vehicles encounters successive greens, creating a progression or “green wave”. Question 34. The “Cycle Length Partition” method in Synchro is used to: A) Determine the optimal cycle length for the entire network based on demand distribution B) Split a long cycle into multiple short cycles for each approach C) Allocate pedestrian phases proportionally to vehicle volumes D) Compute fuel consumption for each vehicle type Answer: A Explanation: Cycle Length Partition evaluates a range of cycle lengths and selects the one that minimizes network delay.
Question 35. In Synchro, a “split” refers to: A) The proportion of cycle length assigned as green time to a particular phase B) The distance between two adjacent intersections C) The number of lanes on a link D) The time between detector activation and phase start Answer: A Explanation: Split is the percentage of the total cycle allocated to a phase’s green interval. Question 36. When optimizing splits, the most critical factor to consider is: A) The $v/c$ ratio of each movement B) The geographic coordinates of the node C) The color of the traffic signal head D) The number of pedestrian crossings Answer: A Explanation: Splits are adjusted to match green time with the demand (volume) relative to capacity for each movement. Question 37. Bandwidth on a time‑space diagram represents: A) The range of speeds over which a platoon can travel without stopping B) The total number of lanes in the corridor C) The amount of fuel saved per vehicle D) The pedestrian crossing time
Question 40. Which of the following is a direct output metric for Synchro’s “Optimization and Coordination” module? A) Estimated CO₂ emissions per hour B) Total number of signal heads required C) Minimum green time for each phase D) Network‑wide average vehicle delay Answer: D Explanation: The optimization engine seeks to minimize overall vehicle delay across the network. Question 41. Fuel consumption in Synchro’s analysis is primarily affected by: A) Number of pedestrian crossings B) Vehicle acceleration and deceleration cycles caused by stops C) The color of the traffic signal heads D) The type of map background used Answer: B Explanation: Stops and starts increase engine load, leading to higher fuel consumption; Synchro estimates this based on stop frequency. Question 42. Greenhouse gas (GHG) emission estimates in Synchro are derived from: A) The amount of time vehicles spend idling at red signals B) The total length of all links in the network C) The number of lanes on each approach D) The pixel resolution of the imported map
Answer: A Explanation: Idling and low‑speed operation increase GHG emissions; Synchro uses delay and stop data to estimate emissions. Question 43. When calibrating a Synchro model, the “Base Year” data typically refers to: A) Historical traffic counts and signal timings used as a reference B) The year the software was released C) Projected future traffic volumes for 2030 D) The year the map imagery was captured Answer: A Explanation: Calibration aligns the model with observed base‑year traffic and signal conditions to ensure accuracy. Question 44. If the modeled average delay is 30 % lower than observed field data, the most likely cause is: A) Overestimation of saturation flow rates B) Underestimation of pedestrian volumes C) Incorrect map scaling D) Using a pre‑timed controller instead of actuated Answer: A Explanation: Higher saturation flow rates reduce calculated delay; over‑estimating them makes the model optimistic. Question 45. In Synchro, the “Link Distance” attribute is used for: A) Calculating travel time between nodes based on speed
Explanation: The node type depends on control; the presence of a median does not dictate the node type by itself. Question 48. The “All‑Red Clearance” interval must be at least: A) 0.5 seconds B) 1.0 second for all intersections C) The sum of Yellow Change plus a safety buffer (typically 1.0 s) D) Equal to the minimum green time Answer: C Explanation: All‑red provides a safety gap after yellow; the required duration depends on speed and approach geometry, generally Yellow + 1 s. Question 49. In Synchro’s “Signal Timing” worksheet, the “Phase Sequence” determines: A) The order in which phases receive green during each cycle B) The number of lanes on each approach C) The type of map projection used D) The pedestrian crossing width Answer: A Explanation: Phase sequence defines the chronological order of green allocations within a cycle. Question 50. A “lead‑through” lane at an intersection is coded in Synchro as: A) An exclusive left‑turn lane B) A lane that allows vehicles to bypass the intersection without stopping C) A lane that merges with the through lane after the intersection
D) A lane designated for bicycles only Answer: B Explanation: Lead‑through lanes permit vehicles to continue straight without encountering the signalized conflict point. Question 51. Which of the following is a correct method to represent a bicycle lane that runs parallel to a vehicular lane? A) Increase the vehicular lane count by one B) Add a separate link with a “Bicycle” vehicle type attribute C) Code the lane as a “shared‑use” lane in the link’s lane configuration D) Use the “Median” attribute to represent the bicycle lane Answer: C Explanation: Shared‑use or dedicated bicycle lane can be indicated in the lane configuration without creating a new link. Question 52. When using the “TripGen” module, the “Trip Distribution” step commonly employs which model? A) Four‑step model’s gravity or entropy‑based distribution B) Simple proportional allocation based on lane count C) Random assignment of trips to any link D) Manual entry of each individual trip Answer: A Explanation: TripGen uses a gravity or entropy‑maximizing approach to distribute generated trips across the network.
