Table I.

Roadway Width (ft)*	For Elementary Students Number of Vehicles	For Secondary Students Number of Vehicles
20 or less	155	175
24	130	150
30	100	120
36	80	100
48	40	60

* If the roadway is divided by a raised median which is at least 8 feet wide and has nonmountable curbs, the roadway should be considered as two separate roadways.

(3) It is necessary for students to cross a railroad-highway grade crossing which has two or more tracks and the following three qualifications are met:

(i) Trains normally—not necessarily with regularity—use the crossing at the time the students cross the tracks going to or from school.

(ii) The crossing is not protected by a flashing light signal or a crossing guard.

(iii) The speed of the trains and the available sight distance are such that students walking at a speed of 3.5 feet per second cannot safely cross the tracks.

(b) A student walking route shall be considered hazardous if a sidewalk does not exist and either paragraph (1) or (2) applies:

(1) The shoulders are less than 4 feet wide and for either:

(i) Elementary students, the roadway surface is less than 20 feet wide and one or more trucks with three or more axles, not including garbage trucks or other types of trucks making house-to-house stops, normally use the roadway during the time the elementary students are enroute to or from school.

(ii) Streets and highways with an average traffic volume of at least ten vehicles per hour during the time students are walking, a 3.5-foot tall elementary school student or a 4.5-foot tall secondary student is not visible by approaching drivers from at least the following minimum distances: