A tenant improvement (TI) allowance is a specified sum of money (often expressed in $__ per square foot) that a Lessor contributes toward the cost of Lessee's build-out.  Many Lessors choose to contribute the TI allowance after construction is completed and once Lessees begin paying their lease payments.
  
 Here is an article that further outlines the basic definition of TI - or tenant improvements/tenant improvement allowance.  

http://www.reoptimizer.com/Real-Estate-Optimization-Blog/bid/203343/Basic-Tenant-Improvements-for-Commercial-Real-Estate 

[Lease terms are negotiable.  Consult with your commercial real estate professional for guidance on what terms will best suit the needs for your project.] 

FOR IMMEDIATE RELEASE
June 9, 2016

Brief traffic stoppages planned for South Memorial Parkway

HUNTSVILLE — The Alabama Department of Transportation advises motorists that brief traffic stoppages, anticipated to last two to three minutes, will occur on South Memorial Parkway (U.S. 231/Alabama 53) at Martin Road between 6 a.m. and noon Sunday, June 12, for construction activities on the new Martin Road bridge.