DPWH Blue Book

A ________ speed limit would only be appropriate on very high standard expressways, which have a low crash rate.

• 50 kph

• 80 kph

• 100 kph

• 120 kph

The capacity of a route can be affected by the following factors except

• Number of lanes

• Traffic Composition

• Terrain and Road Gradient

• Lay-bys position

Vehicles parked near intersections can obstruct the flow of turning traffic. Thus, angle parking should be prohibited within the minimum distances from the boundaries of intersecting roads:

• 6 m on both approach and exit sides

• 6 m on approach side, 3 m on exit side

• 12 m on both approach and exit sides

• 12 m on approach side, 9 m on exit side

The first aim of safe road design is to ensure that road users remain safely one the road. This depends on the following factors:
I. a sound road surface;
II. an adequate width or cross-section;
III. horizontal and vertical alignment;
IV. good visibility/sight distance;
V. delineation and signing;
VI. provision for pedestrians, pedal cyclists and people with disabilities;
VII. management of traffic conflicts at intersections: and
VIII. speed management

• I, V, and VI only

• II, III , and IV only

• III, IV,VII, and VIII o

• All of the above

Dependent on design speed and vehicle type. It is a major road safety design control when determining the horizontal and vertical geometric alignment for a new or rehabilitation design.

• Object Height

• Sight Distance

• Driver Eye Height

• Design Superelevation

For a two lane national road the minimum width is a total of

• 4.5 m

• 5.4 m

• 6.7 m

• 7.6 m

Principles of good design to reduce the likelihood of traffic accidents include:
I. Minimize the speed of vehicles at potential collision points;
II. Separate movements and points of conflict by channelization, or in some situations, prohibit certain movements;
III. Control movements to reduce the possibility of conflict;
IV. Clearly define vehicle paths by use of pavement markings;
V. Separate vehicle movements in time

• I, II, and III only

• III, IV, and V only

• I, II, III, and IV only

• All of the above

A conflict point occurs where two travel paths interact or cross. Safe intersection design uses the following principle:
I. Minimizing the number of conflict points;
II. Minimize the area of conflict;
III. Separating points of conflict:
IV. Giving preference to major movements; and
V. Minimizing relative speed of conflicting movements.

• I and III only

• II and IV only

• I, II, III, and IV only

• All of the above

The vectorial speed of convergence of the vehicles in a conflict maneuver.

• Relative Speed

• Control of Speed

• Attaining Low Relative Speeds

• Channelization

The _________ is mainly used for regulatory signs.

• Octagon

• Equilateral Triangle

• Circle Symbol

• Rectangle