As I understand it, "temeraria" is a good option for "reckless".

Or perhaps: "negligencia/temeridad/imprudencia al conducir"


careless - (driving) negligente
https://es.oxforddictionaries.com/traducir/ingles-espanol/ca...

reckless endangerment / (British) driving — imprudencia temeraria (al conducir)
https://es.oxforddictionaries.com/traducir/english-spanish/r...

imprudent - imprudente
https://es.oxforddictionaries.com/traducir/ingles-espanol/im...

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Note added at 47 mins (2017-09-12 18:13:50 GMT)
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2013 Mississippi Code
Title 63 - MOTOR VEHICLES AND TRAFFIC REGULATIONS
Chapter 3 - TRAFFIC REGULATIONS AND RULES OF THE ROAD
Article 25 - RECKLESS OR CARELESS DRIVING AND MISCELLANEOUS RULES
§ 63-3-1213 - Careless driving

Any person who drives any vehicle in a careless or imprudent manner, without due regard for the width, grade, curves, corner, traffic and use of the streets and highways and all other attendant circumstances is guilty of careless driving. Careless driving shall be considered a lesser offense than reckless driving.
http://law.justia.com/codes/mississippi/2013/title-63/chapte...

Careless and imprudent Driving Tickets - LAKE OF THE OZARKS

A person charged with Careless and Imprudent Driving or Reckless Driving or, will face costly fines, assessment of points on his/her driving record, license suspension, jail time and/or an insurance rate increase.
http://lakeozarktrafficlaw.com/html/reckless---careless-driv...


A person charged with Reckless Driving or Careless and Imprudent Driving will face costly fines, an assessment of points on his/her driving record, license suspension, jail time and/or an insurance rate increase.
Before surrendering and paying the ticket, contact the Traffic Law Center® to review your legal rights.

Here are reasons why a reckless driving ticket or careless and imprudent driving ticket may be issued:
Excessive speeding (25 mph or more above the posted speed limit)
Racing another vehicle
Attempting to elude a police officer
Passing another driver when visibility of oncoming traffic is limited
Distracted driving
Cell phone use while driving
Texting while driving
Weaving or crossing the center line
Sudden and unnecessary use of the brakes
Squealing tires
https://www.trafficlawcenters.com/reckless-driving-lawyer-st...