Road Intersection Design and Traffic Control

Flashcards covering the definitions, control types, conflict points, and geometric considerations of road intersections based on lecture transcripts.

An intersection is defined as the general area where __________ or more highways join or cross.

two

The two main types of unsignalized intersection controls are Two-way Stop Control (TWSC) and __________.

All-way Stop Control (AWSC)

In a Two-way Stop Control (TWSC) intersection, the __________ road has uninterrupted flow while the minor road traffic stops.

major

According to the right-hand rule in an All-Way Stop Control (AWSC), if vehicles arrive simultaneously, the one on the __________ has priority.

right

Movements in a signalized intersection are separated by __________, while in an interchange they are separated by SPACE.

TIME

A/an __________ is a grade-separated intersection that uses bridges, ramps, or tunnels to allow traffic to flow freely.

Interchange

The three types of conflict points at an intersection are Crossing, Merging, and __________.

Diverging

A 3-leg intersection typically contains a total of __________ crossing conflicts.

$$3$$

A 4-leg intersection contains __________ crossing conflicts and 8 merging conflicts.

$$16$$

A roundabout contains __________ diverging conflicts and 4 merging conflicts.

$$4$$

Permitting all traffic movements, a 6-leg intersection like the Arayat Junction has at least __________ conflict points.

$$172$$

__________ is the separation or regulation of conflicting traffic movements into definite paths of travel by traffic islands or pavement markings.

Channelization

Traffic signs like R6-8 (Keep Right) are usually located in conjunction with __________ at channelized intersections.

islands

The S2-3R sign, which instructs to 'Turn Right Anytime With Care', is used at signalized intersections where the right turning lane is segregated by a __________.

traffic island

__________ lanes are used preceding median openings and intersections to increase capacity and reduce crashes.

Auxiliary

A common disadvantage of traffic control signals is a significant increase in the frequency of __________.

rear-end collisions

Vehicular signal heads currently used in the Philippines are typically __________ or 300 mm in diameter.

$$200\,\text{mm}$$

The __________ is the specific rule-set used to determine the feasibility of AWSC versus TWSC based on major and minor street volumes.

Highway Capacity Manual