Test 16 - Intersection Channelization

Question 1 ప్రశ్న 1

At a broad at-grade intersection, an engineer introduces islands and marked lanes so that vehicle movements follow defined paths rather than spreading across one large paved area. Which description best states the purpose of this treatment?

A It provides vertical separation of all intersecting traffic streams. B It increases the paved conflict area to accommodate unrestricted manoeuvres. C It channelizes traffic by guiding movement paths and organizing potential conflicts at the same general road level. D It removes the need to examine turning-vehicle paths or pedestrian movements.

Question 2 ప్రశ్న 2

A municipal proposal introduces a raised triangular island and a separate turning roadway within an existing four-leg at-grade junction. Which statement correctly distinguishes this measure from grade separation?

A The island separates selected movements horizontally, while grade separation carries conflicting roadways at different elevations. B Both measures remove every merging and diverging manoeuvre from the junction. C The triangular island turns the junction into a full interchange without connecting ramps. D Channelization is possible only when one road passes over the other.

Question 3 ప్రశ్న 3

Which statement is technically incorrect as a general claim about a properly channelized at-grade intersection?

A A channelizing island can provide a suitable location for a traffic-control device. B Channelization can reduce excessive paved area and define turning paths. C A suitably designed island can form part of a pedestrian refuge. D Channelization necessarily eliminates every crossing, merging and diverging conflict without any traffic control.

Question 4 ప్రశ్న 4

A sketch of a T-intersection shows an approximately triangular area separating a left-turn slip roadway from the adjacent through-traffic path. What is the most appropriate classification of this area?

A A continuous central median intended only to separate opposing traffic along a road section. B A corner or directional channelizing island defining the separate turning movement. C A grade-separated connector ramp carrying traffic at a different elevation. D A weaving section in which entering and exiting vehicles cross lanes.

Question 5 ప్రశ్న 5

A divided urban road uses a longitudinal raised strip to separate opposing traffic streams as they approach a junction. Which term and principal function best apply?

A Divisional or median island, primarily separating opposing flows and guiding approach alignment. B Corner island, primarily separating two movements travelling in the same turning direction. C Acceleration lane, primarily allowing vehicles to join the mainline at speed. D Pedestrian-only traffic signal, primarily separating vehicle movements in time.

Question 6 ప్రశ్న 6

On a wide multilane road, a raised island is placed within a marked pedestrian crossing and has space for pedestrians to wait before crossing the second traffic stream. What is its principal pedestrian-safety function?

A To increase uninterrupted turning speeds for all vehicles near the crossing. B To replace any need for accessible crossing design or pedestrian sight distance. C To provide a refuge that can divide a long crossing into two more manageable stages. D To eliminate the need for pedestrian-vehicle conflict assessment at the junction.

Question 7 ప్రశ్న 7

A highway engineer is choosing between flush painted channelization and a raised curbed island at an intersection. Which comparison is most defensible?

A Painted channelization physically prevents vehicles from crossing its boundary, whereas raised islands never do. B Painted markings provide visual guidance without a raised obstacle, whereas a curbed island provides stronger physical definition but needs appropriate visibility and impact-risk treatment. C Raised islands are always suitable in every high-speed traffic lane regardless of their shape and placement. D The two treatments are equivalent for pedestrian refuge even when the painted area offers no protected waiting space.

Question 8 ప్రశ్న 8

Drivers approaching a newly constructed raised divisional island report difficulty seeing its leading nose at night. Which modification is most appropriate?

A Remove advance markings because the island itself is a sufficient warning at every operating speed. B Relocate the island nose into the normal vehicle wheel path to make its location obvious. C Use only a larger island behind the nose without changing its approach visibility. D Provide suitable advance taper or approach markings and conspicuous retroreflective delineation of the nose, while checking its offset and sight distance.

Question 9 ప్రశ్న 9

A corner island is proposed in a location frequently used by articulated trucks. Which check is essential before fixing its kerb line?

A Compare only the island's plan area with the gross area of the whole intersection. B Check the design vehicle's swept path, wheel tracking and necessary lateral clearances for the actual turning manoeuvre. C Use the tightest geometric curve regardless of trailer off-tracking or lane encroachment. D Determine the layout exclusively from daily pedestrian volume without vehicle-turning data.

Question 10 ప్రశ్న 10

At an urban junction operating under left-hand traffic, a high volume of right-turning vehicles is delaying through vehicles in a shared approach lane. Which treatment most directly separates the queueing movements while retaining the junction at grade?

A Provide an appropriately designed exclusive right-turn lane and storage area, subject to conflict and traffic-control checks. B Introduce a continuous island across the entire approach that blocks all movements including through traffic. C Increase the corner radius for left-turning vehicles without examining the right-turn queue. D Provide a pedestrian refuge alone and assume that the right-turn demand disappears.

Question 11 ప్రశ్న 11

An at-grade intersection has a substantial left-turn movement in left-hand traffic. A separate left-turn roadway is formed around a triangular channelizing island. What additional safety issue requires explicit design attention?

A The slip roadway becomes an overpass and requires vertical clearance beneath it. B The island necessarily removes the need to control merging movements into the receiving road. C Left-turning vehicles may still conflict with pedestrians crossing the slip lane and with traffic at its receiving-road merge. D All traffic streams become completely independent after the triangular island is constructed.

Question 12 ప్రశ్న 12

An urban arterial median is made continuous across an unsignalized minor-road access, preventing right turns across opposing traffic under left-hand traffic operation. Which interpretation is most accurate?

A The restriction is a form of grade separation because crossing traffic is prohibited. B It eliminates all traffic conflicts at the minor-road access, including entry and exit merges. C It automatically maintains every former direct route without diversion or downstream effects. D It removes specified crossing movements through access control, but remaining left-in and left-out movements and alternative routes require evaluation.

Question 13 ప్రశ్న 13

A preliminary channelized-junction drawing shows a wide turn around a small island. The engineer is concerned that a long rigid vehicle may overrun the island while making the turn. What is the most reliable next design step?

A Check a design-vehicle swept-path template and revise island shape, offsets or turning roadway width if required. B Assume that the painted lane centreline alone guarantees clearance for every design vehicle. C Increase the island height without modifying its plan position or checking wheel tracking. D Remove all turning-movement counts because geometry alone determines the required lane arrangement.

Question 14 ప్రశ్న 14

At a signalized four-leg intersection in left-hand traffic, an island and lane markings guide right-turning vehicles into a dedicated lane, but their paths still cross opposing through traffic when both movements receive green. Which conclusion is correct?

A The crossing conflict is physically eliminated merely because the approach lanes are channelized. B Channelization ensures that both streams can safely proceed simultaneously at every volume. C The paths are better defined, but the crossing conflict remains unless suitable signal phasing or movement control separates it. D The conflict becomes a grade-separated weaving movement as soon as a raised island is built.

Question 15 ప్రశ్న 15

An exclusive turning lane at a channelized junction is expected to store 13 passenger cars. In a simplified storage calculation, allow 6.5 m per stopped car including its share of spacing. What storage length is required, excluding any taper and deceleration length?

A 78.0 m. B 84.5 m. C 91.0 m. D 97.5 m.

Question 16 ప్రశ్న 16

For a simplified area estimate, the triangular footprint of a proposed channelizing island has a base of 8 m and a perpendicular altitude of 5 m. Ignoring rounded corners, what is its plan area?

A 13 m². B 26 m². C 40 m². D 20 m².

Question 17 ప్రశ్న 17

A straight marked pedestrian crossing has a total kerb-to-kerb width of 20 m, including a 4 m wide central refuge island. The remaining traffic-carrying widths on the two sides are equal. How much traffic-carrying width must a pedestrian cross in each stage?

A 6 m. B 10 m. C 8 m. D 12 m.

Question 18 ప్రశ్న 18

During the peak hour, a channelized intersection approach carries 1,000 vehicles, of which 250 use an exclusive turning lane. What proportion of the approach vehicles use the turning lane?

A 20%. B 25%. C 30%. D 40%.

Question 19 ప్రశ్న 19

A preliminary turning-lane layout has three explicitly nonoverlapping longitudinal components: 70 m of queue storage, 25 m of taper and 30 m of deceleration length. What is the combined length of these components?

A 125 m. B 100 m. C 95 m. D 155 m.

Question 20 ప్రశ్న 20

For an illustrative advance-delineation exercise, a vehicle approaches the nose of a divisional island at a constant 54 km/h. How far does it travel in an assumed 1.5-second preview interval?

A 15.0 m. B 18.0 m. C 30.0 m. D 22.5 m.

Question 21 ప్రశ్న 21

For a simplified circular-turn swept-path check, the outside and inside limits of the design vehicle's required path have radii of 11 m and 8 m from the same centre. If an additional 0.5 m lateral clearance is required at each boundary, what total radial width should be reserved?

A 3.0 m. B 4.0 m. C 4.5 m. D 5.0 m.

Question 22 ప్రశ్న 22

An intersection is redesigned with a central pedestrian refuge, but a high-volume slip lane still crosses the marked pedestrian route. What additional measure should the engineer consider?

A Assume the refuge alone eliminates any pedestrian conflicts with the slip-lane movement. B Increase the slip-lane corner radius solely to raise turning speed without checking crossing demand. C Provide an appropriately located, accessible crossing and suitable slip-lane speed or yield control based on pedestrian and vehicle conditions. D Move the refuge away from the crossing and remove pedestrian markings without reviewing the desire line.

Question 23 ప్రశ్న 23

A multi-leg urban intersection contains a very large undivided paved area, and drivers take inconsistent diagonal paths across it. Which channelization strategy most directly addresses the problem?

A Increase the uninterrupted paved area so drivers can choose an even wider range of paths. B Use a single turning radius for every approach irrespective of movement direction and design vehicle. C Replace all turning lanes with one broad shared area and rely on informal driver negotiation. D Define appropriate lanes and island boundaries to simplify movements, while checking remaining conflicts, sight distance and pedestrian routes.

Question 24 ప్రశ్న 24

A divided arterial in a left-hand-traffic network has frequent severe conflicts caused by vehicles turning right across the median into minor accesses. Which channelization and access-management treatment is most directly relevant, if alternative routes are feasible?

A Use selected continuous median sections to prevent uncontrolled right turns and provide appropriately designed permitted turning opportunities elsewhere. B Make every median opening wider so drivers can turn right at higher speeds without yielding. C Remove all median separation and allow diagonal crossings at any point on the arterial. D Install a pedestrian refuge alone while retaining every problematic right-turn crossing movement unchanged.

Question 25 ప్రశ్న 25

A city is selecting a channelization scheme for a T-intersection with high bus turning demand, pedestrians, approach-speed variation and several recorded side-swipe crashes. Which selection procedure is most defensible?

A Select the island shape solely from the available unused paved area without assessing turning paths. B Use a large free-flow slip lane regardless of pedestrian crossing exposure or buses' swept paths. C Combine classified turning counts, design-vehicle swept paths, pedestrian needs, sight distance, speed, crash patterns and feasible control measures to refine the island and lane layout. D Replace traffic-volume and safety studies with a standard triangular island of fixed dimensions at every site.

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