31.5. Relation between time mean speed and space mean speed

Try these first

1. 1.

   Define Time Mean Speed (TMS).

   Hint

   Think about averages calculated over periods.

2. 2.

   What is Space Mean Speed (SMS)?

   Hint

   Consider how space and distance come into play.

3. 3.

   What is the primary difference between TMS and SMS?

   • A) TMS is calculated using time intervals
   • while SMS uses spatial distribution.
   • B) TMS includes only fast vehicles
   • while SMS does not.
   • C) TMS is always less than SMS.
   • D) TMS accounts for vehicle spacing only.

   Hint

   Remember which speed focuses on time vs. space.

4. 4.

   True or False: Time Mean Speed is always less than or equal to Space Mean Speed.

   • True
   • False

   Hint

   Think about the definitions of each speed.

5. 5.

   A traffic study shows speeds of vehicles at a junction: 25, 30, 35, 45, and 50 km/h. Calculate both TMS and SMS. Discuss which speed is most relevant to traffic management.

   Hint

   Setting up averages is key!

6. 6.

   Discuss how changes in speed limits on a road would affect TMS and SMS. Provide theoretical examples illustrating potential differences.

   Hint

   Frame changes in terms of traffic flow impacts!