§ 4107. Obedience to and required traffic-control devices.
(a) The driver of any vehicle shall obey the instructions of any traffic-control device applicable thereto placed in accordance with this title unless otherwise directed as authorized in § 4103 of this title, subject to the exceptions granted the driver of an authorized emergency vehicle in this title.
(b) No provision of this chapter for which traffic-control devices are required shall be enforced against an alleged violator if at the time and place of the alleged violation an official traffic-control device is not in proper position and sufficiently legible to be seen by an ordinarily observant person. This subsection shall not operate to relieve a driver of the duty to operate a vehicle with due regard to the safety of all persons using the highway.
(c) Whenever a particular Section does not state that traffic-control devices are required, such section shall be effective even though no traffic-control devices are erected or in place.
(d) In the event a traffic-control signal is erected and maintained at a place other than an intersection, this title shall be applicable except as to those provisions which by their nature can have no application.
(e) Whenever traffic-control devices are placed in position approximately conforming to the requirements of this title, such devices shall be presumed to have been so placed by the official act or direction of lawful authority, unless the contrary shall be established by competent evidence.
(f) Any traffic-control device placed pursuant to this title and purporting to conform to the lawful requirements pertaining to such devices shall be presumed to comply with the requirements of this title, unless the contrary shall be established by competent evidence.
21 Del. C. 1953, § 4107; 54 Del. Laws, c. 160, § 1; 57 Del. Laws, c. 670, § 13A; 60 Del. Laws, c. 701, § 10; 70 Del. Laws, c. 186, § 1.;

§ 4108. Traffic-control signal legend.
(a) Whenever traffic is controlled by traffic-control signals exhibiting different colored lights, or colored lighted arrows, successively 1 at a time or in combination, only the colors green, red and yellow shall be used, except for special pedestrian signals carrying a word or symbol legend, and such lights shall indicate and apply to drivers of vehicles and pedestrians as follows:
(1) Green indication:
a. Vehicular traffic facing the signal may proceed straight through or turn right or left unless a traffic-control device at such place prohibits either such turn. Vehicular traffic, including vehicles turning right or left, shall yield the right-of-way to other vehicles and to pedestrians lawfully within the intersection or an adjacent crosswalk at the time such signal is exhibited.
b. Unless otherwise directed by a pedestrian-control signal as provided in § 4109 of this title, pedestrians facing any green signal, except when the sole green signal is a turn arrow, may proceed across the roadway within any marked or unmarked crosswalk.
(2) Circular yellow or yellow arrow:
a. Vehicular traffic facing the circular yellow signal is thereby warned that a red signal for the previously permitted movement will be exhibited immediately thereafter.
b. Vehicular traffic facing the yellow arrow signal shown alone or in combination with another indication is thereby warned that the previously displayed green arrow signal is being terminated. The yellow arrow signal may be followed by a red signal or a green signal.
c. Pedestrians facing a yellow signal, unless otherwise directed by a pedestrian control signal, are thereby advised that there is insufficient time to cross the roadway before a red indication is shown and no pedestrian shall then start to cross the roadway.
(3) Red indication:
a. Vehicular traffic facing the red signal shall stop before crossing the stop limit, whether marked by sign or painted line, or if none, before entering the crosswalk on the near side of the intersection or, if none, then before entering the intersection and shall remain standing until an indication to proceed is shown or as provided in subparagraph b. of this paragraph.
b. When a traffic-control device is not in place prohibiting such turn, vehicular traffic facing a circular red signal may cautiously enter the intersection to turn right or to turn left from a one-way roadway onto a one-way roadway.
c. When turns on red are permitted, the right to proceed to turn after stopping shall be subject to the rule applicable after making a stop as at a stop sign.
d. No pedestrian facing such signal shall enter the roadway unless the pedestrian can do so safely and without interfering with any vehicular traffic.
(4) Green arrow or arrows:
a. Vehicular traffic facing a green arrow signal, shown alone or in combination with another indication, may cautiously enter the intersection only to make the movement indicated by such arrow, or such other movement as is permitted by other indications shown at the same time. Such vehicular traffic shall yield the right-of-way to pedestrians lawfully within an adjacent crosswalk and to other traffic lawfully using the intersection.
b. Vehicles facing such signals are thereby advised that other traffic movements may be prohibited from the lane or lanes that the signal indication controls. Making or attempting to make any prohibited movement is unlawful.
c. Pedestrians facing such signals shall not enter the roadway unless they can do so safely and without interfering with any vehicular traffic.
(b) When lane use control signals are placed over the individual lanes of roadway or highway, vehicular traffic may travel in any lane or lanes over which a green signal is shown, but shall not enter or travel in any lane or lanes over which a red signal is shown. Left turns may be made across such lane if not otherwise prohibited. Vehicular traffic shall move from any lane over which a steady amber signal is displayed as soon as the movement can be made in safety. Vehicular traffic may use a lane over which a flashing yellow signal is displayed for the purpose of making a left turn.
(c) In the event that traffic signals are in place and no lighted indication is visible to an approaching driver, the approaching driver shall reduce speed and prepare to yield to other vehicles in or approaching the intersection.
(d) Whoever violates this section shall be fined not less than $75 nor more than $115. Whoever violates paragraph (a)(3) of this section shall be fined not less than $75 nor more than $230. For each subsequent offense of paragraph (a)(3) within 2 years, the person shall be fined not less than $100 nor more than $575, or imprisoned not less than 10 nor more than 60 days, or both.
(e) Notwithstanding any provision of the Delaware Code to the contrary, any local government, municipality, town or county, whether incorporated or unincorporated, shall pay to the General Fund any sums collected under this section or any substantially conforming ordinances and regulations enacted by local authorities that exceed the maximum fine permitted under the law as it existed prior to the effective date of subsection (d).
21 Del. C. 1953, § 4108; 54 Del. Laws, c. 160, § 1; 58 Del. Laws, c. 430; 58 Del. Laws, c. 570; 60 Del. Laws, c. 701, § 11; 70 Del. Laws, c. 186, § 1; 72 Del. Laws, c. 407, § 1.;

§ 4109. Pedestrian-control signals.
Whenever special pedestrian-control signals exhibiting the words or symbols “Walk” or “Don’t Start” or “Don’t Walk” are in place, such signals shall take precedence over pedestrian movements outlined in § 4108 of this title. Such signals shall apply as follows:
(1) Walk or Flashing Walk. — Pedestrians facing such signals may proceed across the roadway in the direction of the signal and shall be given the right-of-way by the driver of all vehicles.
(2) Don’t Walk or Flashing Don’t Walk or Don’t Start. — No pedestrian shall start to cross the roadway in the direction of such signal, but any pedestrian who has partially completed crossing on the walk signal shall proceed to the nearest sidewalk or safety island.
21 Del. C. 1953, § 4109; 54 Del. Laws, c. 160, § 1; 60 Del. Laws, c. 701, § 12; 70 Del. Laws, c. 186, § 1.;

§ 4110. Traffic signals.
(a) Whenever a flashing red, yellow or green signal is used in a traffic signal or with a traffic sign, it shall require obedience by vehicle traffic as follows:
(1) Flashing Red. — When a red lens is illuminated with intermittent flashes, drivers of vehicles shall stop before crossing the stop limit whether marked by a sign or painted line, but if none, before entering the crosswalk on the near side of the intersection, or if none, then before entering the intersection, and the right to proceed shall be subject to the rules applicable after making a stop as at a stop sign.
(2) Flashing Yellow or Green. — When a yellow or green lens is illuminated with intermittent flashes, drivers of vehicles may proceed through the intersection or pass such signals only with caution.
(b) In the event that flashing signals are in place and no lighted indication is visible to an approaching driver, the approaching driver shall reduce speed and prepare to yield to other vehicles in or approaching the intersection. If facing a stop sign, the approaching driver shall stop and proceed as from a stop sign.
(c) This section shall not apply at railroad grade crossings.