Test Yourself

There are five maps to choose from in this test where you'll need to measure the intersection distance for a given scenario to calculate if a dilemma or option zone exists. You can refer to our help by clicking on the info button at any time. Or consider using our calculator for best results.

For help on the coefficient of friction click here:

For instructions on how to measure distances across the intersection using Google Maps choose one of the following:

Table 1: A list of common coefficient of friction numbers

#	Tire Conditions	Weather Conditions	μ
1	Good	Dry	0.8 - 0.9
2	Good	Wet	0.6 - 0.7
3	Good	Snowy	0.4 - 0.5
4	Good	Icy	0.1 - 0.3
5	Average	Dry	0.75 - 0.8
6	Average	Wet	0.5 - 0.6
7	Average	Snowy	0.3 - 0.4
8	Average	Icy	0.1 - 0.2
9	Bad	Dry	0.7 - 0.75
10	Bad	Wet	0.4 - 0.5
11	Bad	Snowy	0.2 - 0.3
12	Bad	Icy	0.1

Some estimation is required for the calculation of μ which may lead to slightly altered results comparing to our calculator. This is because the calculation includes some randomness to account for realistic scenarios.

Map One

Map one is located in Moscow, Russia at Tverskaya Zastava Square.

Scenario One

Determine the size of the intersection using the Google Map link provided. Then click on the scene button and use the data provided to establish if a dilemma zone exists under these conditions.

Click on the map on or near the marker (make sure you're in satellite mode) and once you have established road names you can turn off labels for ease in measuring the intersection.

Measure the intersection length from the south east and continuing north west on Leningradsky Ave over Tverskaya Zastava Square.

Map Two

Map two is located in Sydney, Australia where the M7 is crossed by Sunnyholt Road.

Scenario Two

Determine the size of the intersection using the Google Map link provided. Then click on the scene button and use the data provided to establish if a dilemma zone exists under these conditions.

Click on the map on or near the marker (make sure you're in satellite mode) and once you have established road names you can turn off labels for ease in measuring the intersection.

Measure the intersection length heading from the south west continuing north east on Sunnyholt Road over the M7.

Map Three

Map three is located in Ashburn, Virginia in the USA where the Harry Byrd Highway is intersected by Lexington Drive.

Scenario Three

Determine the size of the intersection using the Google Map link provided. Then click on the scene button and use the data provided to establish if a dilemma zone exists under these conditions.

Click on the map on or near the marker (make sure you're in satellite mode) and once you have established road names you can turn off labels for ease in measuring the intersection.

Measure the intersection length heading from the south west continuing north east on Lexington Drive over the Harry Byrd Highway.

Map Four

Map four is located in Nürnberg, Germany at Sigmundstraße and Leyher Street.

Scenario Four

Determine the size of the intersection using the Google Map link provided. Then click on the scene button and use the data provided to establish if a dilemma zone exists under these conditions.

Click on the map on or near the marker (make sure you're in satellite mode) and once you have established road names you can turn off labels for ease in measuring the intersection.

Measure the intersection length heading from the east continuing west on Sigmundstraße over Leyher Street.

Map Five

Map five is located in Dublin at Northside where Constitution Hill is intersected by Western Way.

Scenario Five

Determine the size of the intersection using the Google Map link provided. Then click on the scene button and use the data provided to establish if a dilemma zone exists under these conditions.

Click on the map on or near the marker (make sure you're in satellite mode) and once you have established road names you can turn off labels for ease in measuring the intersection.

Measure the intersection length heading from the south continuing north on Constitution Hill.