Baltimore City Speed Limit information from Mike Pruett.
Link to a graphic representation of IH 83:

Maryland Exit  Number
State Highway, Street name or Exit Destination SPEED LIMITS and County Lines		Other   Features
Northbound-Scroll Down	Southbound
	East Fayette Street	Baltimore  Inner  Harbor
MarylandJones Falls Expressway EXIT 2
	Halliday Street
MarylandJones Falls Expressway EXIT 3
Eager Street	Guilford Ave
MarylandJones Falls Expressway EXIT 4
Biddle Street
MarylandJones Falls Expressway EXIT 5
Saint Paul Street  Calvert Street
MarylandJones Falls Expressway EXIT 6
TRUCK  North Ave
MarylandJones Falls Expressway EXIT 7
Druid Park Lake Dr		Druid Lake Park
28th Street		Baltimore Zoo
MarylandJones Falls Expressway EXIT 8
Falls Road
MarylandJones Falls Expressway EXIT 9
Cold Spring Lane EAST	Cold Spring Lane	Loyola College
		Notre Dame College
Cold Spring Lane WEST		Johns Hopkins University
MarylandJones Falls Expressway EXIT 10
Northern Parkway EAST	Northern Parkway	Saint Mary's University
		Clyburn Arboretum
Northern Parkway WEST		Pimlico Race Course
MILE 9.66
MarylandJones Falls Expressway EXIT 12
Ruxton Road
Northbound Scroll Down	Southbound Scroll Up
MarylandJones Falls Expressway EXIT 13
NORTH  Baltimore Beltway  Towson  Glen Burnie  KEEP RIGHT NORTHBOUND AND SOUTHBOUND
THRU TRAFFIC   Falls Road
MarylandBaltimore-Harrisburg Expressway EXIT 14
	SOUTH  Baltimore Beltway  Glen Burnie  Towson  KEEP RIGHT NORTHBOUND AND SOUTHBOUND
Northbound Scroll Down	Southbound Scroll Up
Mile 14.8
MarylandBaltimore-Harrisburg Expressway EXIT 16
Timonium Road EAST	Timonium Road	Maryland  State  Fairgrounds  USE Timonium Road EAST
Timonium Road WEST
MarylandBaltimore-Harrisburg Expressway EXIT 17
Padonia Road
Mile 18.5
MarylandBaltimore-Harrisburg Expressway EXIT 18
Cockeysville Road
EXIT 20A-B
Shawan Road  EAST Hunt Valley		Oregon Ridge Park  USE EXIT 20 B
Shawan Road WEST Shawan
MarylandBaltimore-Harrisburg Expressway EXIT 24
Belfast Road
MarylandBaltimore-Harrisburg Expressway EXIT 27
Hereford		Gunpowder Falls  State Park  USE  WEST
MarylandBaltimore-Harrisburg Expressway EXIT 31
Middletown Road  Wiseburg  Rayville		Gunpowder Falls  State Park
MarylandBaltimore-Harrisburg Expressway EXIT 33
Parkton
Mile 35.2
MarylandBaltimore-Harrisburg Expressway EXIT 36
Maryland Line Bel Air
MarylandBaltimore-Harrisburg Expressway EXIT 37
	Maryland Line
Mile 37
Northbound	Southbound-Scroll Up
State Highway, Street name or Exit Destination SPEED LIMITS and County Lines		Other Features
Maryland Exit  Number