SAN DIEGO (KGTV) - When it comes to wrong-way crashes in San Diego County, 2018 is off to an unfortunate start.
There have been numerous wrong-way vehicle crashes around the county nearly eight weeks into the new year, and authorities have not been able to pinpoint what exactly is causing an uptick in these types of crashes.
According to Caltrans data, from 1995-2012, an average of 23 people died each year in wrong-way crashes on California roadways.
San Diego had 13 wrong-way fatalities recorded in 2015 -- the last year Caltrans data was compiled for wrong-way crashes.
In 2017, Caltrans launched a two-year pilot program in San Diego and Sacramento that focuses on ways to not only prevent wrong-way crashes but to also alert authorities in the event a vehicle is traveling in the wrong direction.
As part of the test program, Caltrans has deployed reflective pavement markings on off-ramps and signs with flashing lights that turn on if a wrong-way vehicle is detected.
Caltrans has not yet provided data collected from the program to determine the protective measures' effectiveness.
Here's a look at wrong-way crashes on San Diego County roadways in the past 12 months.
Feb. 20, 2018: Driver arrested on suspicion of DUI after wrong-way crash
-- A driver was hospitalized -- and also arrested -- after police said he was driving in the wrong direction on Fairmount Ave. when he hit another vehicle. STORY
Feb. 18, 2018: One dead, five injured in crash at Scripps Ranch
-- A 90-year-old woman died and five others were injured after a head-on collision at a Scripps Ranch intersection. STORY
Feb. 17, 2018: At least 1 dead in possible head-on crash in Sorrento Valley
-- The driver of a Honda driving the wrong way was killed after colliding head-on with a truck on I-5 near Sorrento Valley Road. STORY
Jan. 31, 2018: Suspected drunken driver crashes head-on into unmarked CBP vehicle
-- A woman accused of drunken driving was traveling northbound on southbound Fairmount Ave. when she crashed into an unmarked Customs and Border Protections SUV. STORY
Jan. 29, 2018: Injuries reported in wrong-way crash on Interstate 5
-- A driver traveling the wrong way on I-5 in the National City area crashed into another vehicle, injuring two children. STORY
Dec. 18, 2017: 2 drivers injured in Tierrasanta wrong-way crash
-- A PT Cruiser traveling the wrong way on Tierrasanta Blvd. crashed into a pickup truck, leading to injuries to both drivers. STORY
Oct. 14, 2017: Driver dies after head-on collision in Escondido
-- One person was killed after police said a Saturn veered into the opposite lanes and collided head-on with a Toyota. STORY
July 8, 2017: One dead in wrong-way I-5 collision in National City
-- Two vehicles collided on I-5 in the National City area, killing one person and leaving both vehicles in flames. STORY
July 7, 2017: 2 killed in wrong-way crash on Interstate 5 in Oceanside
-- A Toyota Camry driving the wrong way on I-5 crashed head-on into a Toyota SUV. Both drivers died at the scene, the CHP said. STORY
June 27, 2017: Valley Center head-on collision leaves two dead
-- An SUV crossed over the double line on Lilac Road and crashed into a Mercedes, killing two of its occupants. STORY
June 19, 2017: 1 dead, 1 injured after wrong-way head-on crash in Fallbrook
-- Authorities say a Honda was going in the wrong direction at a high rate of speed on Via Encinos Drive when it collided with a van. STORY
May 5, 2017: 1 dead, 2 hurt in head-on collision in El Cajon
-- A man was killed and two others were injured after a collision on Avocado Avenue. STORY
March 27, 2017: Wrong-way driver crashes on Coronado Bridge, prompts lane closures
-- A suspected DUI driver was driving the wrong way on the Coronado Bridge when she crashed into two other vehicles. STORY
Feb. 9, 2017: Wrong-way driver hits cars on northbound I-5 in Chula Vista
-- An elderly driver traveling south on northbound I-5 crashed into multiple vehicles. STORY
RELATED: Team 10 report: Wrong-way crashes causing concern on San Diego freeways