Warning sign drawings for the driver view, one per type the warning type classifier knows, named after it.
The MUTCD sign drawings on Wikimedia Commons (public domain), as PNG renders about 500 px wide:

added_lane_left.png  MUTCD W4-3L  https://commons.wikimedia.org/wiki/File:MUTCD_W4-3L.svg
added_lane_right.png  MUTCD W4-3R  https://commons.wikimedia.org/wiki/File:MUTCD_W4-3R.svg
bicycle.png  MUTCD W11-1  https://commons.wikimedia.org/wiki/File:MUTCD_W11-1.svg
chevron_left.png  MUTCD W1-8L  https://commons.wikimedia.org/wiki/File:MUTCD_W1-8L.svg
chevron_right.png  MUTCD W1-8R  https://commons.wikimedia.org/wiki/File:MUTCD_W1-8R.svg
curve_left.png  MUTCD W1-2L  https://commons.wikimedia.org/wiki/File:MUTCD_W1-2L.svg
curve_right.png  MUTCD W1-2R  https://commons.wikimedia.org/wiki/File:MUTCD_W1-2R.svg
deer.png  MUTCD W11-3  https://commons.wikimedia.org/wiki/File:MUTCD_W11-3.svg
fire_truck.png  MUTCD W11-8  https://commons.wikimedia.org/wiki/File:MUTCD_W11-8.svg
lane_ends_left.png  MUTCD W4-2L  https://commons.wikimedia.org/wiki/File:MUTCD_W4-2L.svg
lane_ends_right.png  MUTCD W4-2R  https://commons.wikimedia.org/wiki/File:MUTCD_W4-2R.svg
large_arrow_left.png  MUTCD W1-6L  https://commons.wikimedia.org/wiki/File:MUTCD_W1-6L.svg
large_arrow_right.png  MUTCD W1-6R  https://commons.wikimedia.org/wiki/File:MUTCD_W1-6R.svg
merge_right.png  MUTCD W4-1  https://commons.wikimedia.org/wiki/File:MUTCD_W4-1.svg
pedestrian.png  MUTCD W11-2  https://commons.wikimedia.org/wiki/File:MUTCD_W11-2.svg
roundabout.png  MUTCD W2-6  https://commons.wikimedia.org/wiki/File:MUTCD_W2-6.svg
school.png  MUTCD S1-1  https://commons.wikimedia.org/wiki/File:MUTCD_S1-1.svg
signal_ahead.png  MUTCD W3-3  https://commons.wikimedia.org/wiki/File:MUTCD_W3-3.svg
stop_ahead.png  MUTCD W3-1  https://commons.wikimedia.org/wiki/File:MUTCD_W3-1.svg
two_direction_arrow.png  MUTCD W1-7  https://commons.wikimedia.org/wiki/File:MUTCD_W1-7.svg
two_way_traffic.png  MUTCD W6-3  https://commons.wikimedia.org/wiki/File:MUTCD_W6-3.svg
