1. A method comprising: map-matching one or more drive data sessions with map links, wherein the one or more drive data sessions represent one or more location data packages associated with a road currently travelled by a vehicle, wherein the one or more location data packages are crowd sourced and each of the one or more location data packages includes, at least in part, position information, lane information, signage information, or a combination thereof; dividing each of the map links at a fixed distance interval into buckets of probe sensor data, wherein the probe sensor data includes slope-curvature values of the map links; processing the buckets of probe sensor data for variance statistics to determine reliability information for acceleration slope values, acceleration curvature values, or a combination thereof associated with the map links and calculated from the one or more location data packages, wherein the reliability information specifies whether the slope-curvature values are reliable and consistent for driving the vehicle in an autonomous driving mode; and updating, in real-time, one or more maps for driving the vehicle in the autonomous driving mode based, at least in part, on the reliability information.