safe. reporter: a csx official says it s a problem across the country and vowed to work with local authorities to keep people off the tracks. howard county executive ken olman said steps will be taken to improve safety. we ve got to take a look at this with csx and figure out how to make sure this is as secure as possible. reporter: back out live at the crash scene, investigators said today this will be a lengthy investigation. in fact the on-scene investigation is expected to last another 48 hours. that s bad news for businesses that are on main street. that means that main street heading into the historic ellicott city will be shut down for at least another 48 hours. now, main street is closed, the road itself, but the businesses are open. many of them say they re suffering as a result. we ll have more on that coming up at 6:00. reporting live from ellicott city, darcy spencer. a virginia map has been formally charged with shooting and wounding a security guard at t