Stop 1

Yes or No? By Anthony Bamugo Rahsaan Nahar Chao Fang

Is It Fair? If you are within the stopping

distance and driving at the speed limit and the light just suddenly turns yellow, you should be able to make it through before the light turns red!

Is It Fair? If you are within the stopping

distance and driving at the speed limit and the light just suddenly turns yellow, you should be able to make it through before the light turns red!

Is It Fair? If you are within the stopping

distance and driving at the speed limit and the light just suddenly turns yellow, you should be able to make it through before the light turns red!

Let’s Find Out 

To find out whether the timing of the yellow light is set up correctly or not, we did simple calculations that involved: - The length of an intersection - The speed limit - The stopping distance - Timing the yellow light - Human reaction time

Let’s Find Out 

To find out whether the timing of the yellow light is set up correctly or not, we did simple calculations that involved: - The length of an intersection - The speed limit - The stopping distance - Timing the yellow light - Human reaction time

Let’s Find Out 

To find out whether the timing of the yellow light is set up correctly or not, we did simple calculations that involved: - The length of an intersection - The speed limit - The stopping distance - Timing the yellow light - Human reaction time

Let’s Find Out 

To find out whether the timing of the yellow light is set up correctly or not, we did simple calculations that involved: - The length of an intersection - The speed limit - The stopping distance - Timing the yellow light - Human reaction time

Let’s Find Out 

To find out whether the timing of the yellow light is set up correctly or not, we did simple calculations that involved: - The length of an intersection - The speed limit - The stopping distance - Timing the yellow light - Human reaction time

The length of an intersection

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

The Length of an Intersection 

All of our measurements were done in feet or feet per seconds. 1 mi/h = 1.4666667 ft/s



We measured the length of the intersections using the widths of the intersecting streets

Stopping Distances

Stopping Distances

Stopping Distances

Stopping Distances

Stopping Distances

Stopping Distances

Prove it 

We combined all the data we have, and started writing formulas to help us with our calculations to prove whether there is a dilemma zone or not.



In our calculations - We assumed that all cars are running at the speed limit as they pass through the intersection

been

- The human reaction time has already calculated into the stopping distance.

d = 12 ft

L = (l + s + l ) i

c

L = (l + s + l ) l = d*nl i

i

c

Prove it 

The inequality below helps us to prove whether the timing of a yellow light is set up correctly or not. Yt => (li

+ s + l)/v c

Prove it 

The inequality below helps us to prove whether the timing of a yellow light is set up correctly or not. Yt => (li

+ s + l)/v c

Prove it 

The inequality below helps us to prove whether the timing of a yellow light is set up correctly or not. Yt => (li

+ s + l)/v c

Prove it 

The inequality below helps us to prove whether the timing of a yellow light is set up correctly or not. Yt => (li

+ s + l)/v c

Prove it 

The inequality below helps us to prove whether the timing of a yellow light is set up correctly or not. Yt => (li

+ s + l)/v c

Prove it 

The inequality below helps us to prove whether the timing of a yellow light is set up correctly or not. Yt => (li

+ s + l)/v c

Prove it 

The inequality below helps us to prove whether the timing of a yellow light is set up correctly or not. Yt => (li

+ s + l)/v c

Perkins & College Drive Intersection Street

Perkins

College Drive

Speed Limit (v)

Sopping Distance (s)

Length (l)

Yellow Light Timing (yt)

58.67 ft/s

120 ft

84 ft

4 sec

58.67 ft/s

120 ft

50 ft

4 sec

Perkins Yt => (li + s + lc) / v 4.00 sec => (84.0 ft + 120 ft + 17.0 ft) / 58.7 ft/s 4.00 sec => 3.76 sec

College Drive Yt => (li + s + lc) / v 4.00 sec => (50.0 ft + 120 ft + 17.0 ft) / 58.7 ft/s 4.00 sec => 3.19 sec

v = 40 mi/h 00:00:00 i

v = 40 mi/h 00:00:29 i

v = 40 mi/h 00:00:92 i

v = 40 mi/h 00:01:38 i

v = 40 mi/h 00:01:77 i

v = 40 mi/h 00:02:09 i

v = 40 mi/h 00:02:20 i

v = 40 mi/h 00:02:55 i

v = 40 mi/h 00:02:98 i

v = 40 mi/h 00:03:19 i

Perkins & Starring Intersection Street

Perkins

Starring

Speed Limit (v)

Sopping Distance (s)

Length (l)

YellowLigh t Timing (Yt)

66 ft/s

120 ft

148.4 ft

5 sec

66 ft/s

120 ft

60 ft

5 sec

Perkins Yt => (li + s + lc) / v 5.00 sec => (148 ft + 120 ft + 17.0) / 66.0 ft/s 5.00 sec => 4.32 sec

Starring Yt => (li + s + lc) / v 5.00 sec => (60.0 ft + 120 ft + 17.0 ft) / 66.0 ft/s 5.00 sec => 2.98 sec

Essen & Summa Intersection Street

Essen

Summa

Speed Limit (v)

Stopping Distance (s)

Length (l)

Yellow Light Timing (Yt)

66 ft/s

120 ft

112 ft

5 sec

44 ft/s

75 ft

104 ft

5 sec

Yt => (li + s + lc) / v 5.00 sec => (112 ft + 120 ft + 17.0 ft) / 66.0 ft/s 5.00 sec => 3.77 sec

Yt => (li + s + lc) / v 5.00 sec => (104 ft + 75 ft + 17.0 ft) / 44.0 ft/s 5.00 sec => 4.45 sec

Highland & Lee Drive Intersection Street

Highland Rd

Lee Drive

Speed Limit (v)

Sopping Distance (s)

Length (l)

Yellow Light Timing (Yt)

51.3 ft/s

106 ft

78 ft

5 sec

51.3 ft/s

106 ft

70 ft

5 sec

HIGHLAND RD Yt => (li + s + lc) / v 5.00 sec => (78.0 ft + 106 ft + 17.0 ft) / 51.3 ft/s 5.00 sec => 3.92 sec

LEE DRIVE Yt => (li + s + lc) / v 5.00 sec => (70.0 ft + 106 ft + 17.0 ft) / 51.3 ft/s 5.00 sec => 3.76 sec

Summary

Essen Lane

Summa & Essen Intersection

Perkins

Highland Rd & Lee Drive Intersection

Starring & Perkins Intersection

Mr. Bamugo

Mr. Bam

Mr.

Antho

Anthony

Rahsaaaan

Oh

I mean

Rahsaan

Chao Fang

Chao Fang

Chao Fang

Chao Fang

Chao Fang

Chao Fang

Chao Fang

Chao Fang

Chao Fang

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Chao Fang

Chao Fang

Chao Fang

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Chao Fang

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Chao Fang

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