Name: ______

Date and time: ______

TMAD Checklist

Name of crossing: ______

Using vision or hearing to detect vehicles? (Choose only one)

____ Using vision

Steadyconditions present temporarily that could affect visibility of vehicles:

(E.g. parked vehicles or barriers; sunny/overcast, precipitation; etc.):

______

____ Using hearing

Steady conditions present temporarily that could affect ability to hear vehicles:

(parked vehicles/barriers; road wet/dry; precipitation; wind; steady noise, etc.):

______

Crossing Time (in seconds):

______“LEFT” Time for crossing lanes from the left

______“RIGHT” Time for crossing entire street (i.e. for crossing all lanes)

Detection-to-Arrival of Vehicles:

From left: “worst car”? “minus”?From right: “worst car”? “minus”?

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

___ seconds ______seconds ______

From the left, shortest time of detection-to-arrival was _____ seconds

From the right, shortest time of detection-to-arrival was _____ seconds

Conclusion for these conditions:

From the left:

____ Situation of Confidence

____ Situation of Uncertainty

From the right:

____ Situation of Confidence

____ Situation of Uncertainty

INSTRUCTIONS FOR TMAD Checklist

Name of crossing:

Indicate

  • the name of the street;
  • where along the street is the crossing (intersecting street, corner, landmark, etc.); and
  • which way you are facing (north or west, or toward a certain landmark, etc.)

Using vision or hearing to detect vehicles? (Choose only one)

It is difficult to test boththe hearing and the vision at the same time (hearing a car might make the student think he sees it before he really does, and vice versa). However the TMAD can be used to analyze the situation using the vision and hearing one at a time (using separate checklists), and determine whether looking or listening is more effective in that situation and conditions.

Crossing Time (in seconds):

The crossing time should be the longest time for the crossing under the given conditions. Timing for the crossing should start when the student is committed to the crossing (e.g. steps forward), and end when the student steps out of danger from traffic on that side.

Detection-to-Arrival of Vehicles:

Space has been provided for 12 vehicles from each direction but the number of trials will depend on how quickly a conclusion can be reached (see below)

“From left” /”from right”

  • If the student is using hearing, you will record the detection of vehicles coming from either direction, so you can use both columns to record the times of detection-to-arrival (“from right” AND “from left”).
  • If using vision, you will record the detection of vehicles coming from only one direction at a time, so you will fill in one columnand make a conclusion for one side first, then the other.

“Worst-case car?”

  • Each time you record the number of seconds from detection to arrival for a vehicle, use the principles on page 8 of Section 2 to make a judgment as to whether you thinkthat vehiclecould be one of the “worst-case cars”

Mark “Yes” in this column if you think it is probably a “worst-case car.”

“Minus?”

  • Each time you record the number of seconds from detection to arrival for a vehicle, compare that time to the crossing time. Mark “YES” in the “Minus?” column if the time for detection-to-arrival of that vehicle was less than the time needed to cross that part of the street ONLY IF
  • the timer was started as soon as the student thought there MIGHT be a vehicle coming;
  • (for students who use hearing)it was quiet when the student heard it

“Quiet” means there is no extraneous noise above the ambient sound level, which might be a steady sound (not what we consider “quiet,” but as quiet as it can be in those conditions – see page 6 in Section 2).

Conclusion for these conditions:

You can draw a conclusion only if one of the following happens:

  • you recorded a vehicle that you and your student consider to be a “worst-case car”AND it was longer than the crossing time (recorded under “worst-case car”)OR
  • you recorded a time-of-detection that is less than the crossing time (recorded under “minus”)