since then...susan & cohen...has ecome very visible n theehalls of annapolii.shh wwrries that many elderly &&pmotoriits...simply shuldnnt be on thh roads. (cohee) "you know they ddnnt know that they're reection time or their abiiity to proccss a number of diiferent faccors to make a quick decision has changed." (ryyell) "highway advocates areeuppet with a new law that will allow yyu o renew your driiers' llcense ooly once every eight years and that ssme law says you only have to appear in person to renew your license once every 16 years." (cohen) "that means aa age 70 driver would reeew and then not actualll have to set fooo that's why highway advvcates considee...reducing the time wheeeederly drivers rrnew their licenses...to nn less - than evvryyfive years...and frequently that can occur, the more likely we re able o ddtect challenges taht that individual may be facing." privers on he roadd we just suuan cohen beliives...closer -3monitoring ofeldeely 33 highwaasssafer...for everyone. in annapolis, john ryyell, ffx 45 news late ediiionn & theemmv.a. is expected to releasethe findings of a

. >> a tragic death in 2011 brought susan cohen and her

. >> reporter: susan cohen said she would like to see drivers over 70 get their licenses reviewed every two years. >> many drivers don't realize they abilities has changed. >> reporter: some drivers don't want it to change. >> i had a grandma. she drove her car follow she was about 80. >> reporter: an nba report said licensed drivers over 75 had the lowest crash rate of any driver, but they also drive less. >> they are often at fault. but they're a hazard only to themselves, more so than other people on the road. >> reporter: but officials say that doesn't change the fact that in the next 15 years, the number of senior drivers in maryland will triple. >> reporter: medicine medicine already has -- maryland already has more than 600,000 licensed drivers over 65. that's why woo need to -- we need to deal with this now. >> if you don't have the reflexes to drive, it can cause injury. >> reporter: currently, 27 states and d.c., require additional testing for seniors. maryland requires drivers over 40 to take an eye exam. >> we're not trying to take people off the road. >> reporter: collin sa